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annotate Modules/operator.c @ 80661:94de77bd0b4b 2.7

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Issue #16194: document imp.load_dynamic problems when read several extension modules from the same binary object file.
author Andrew Svetlov <andrew.svetlov@gmail.com>
date Thu, 29 Nov 2012 19:51:28 +0200
parents b36cb4602e21
children 5885c02120f0
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1
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2 #include "Python.h"
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3
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4 PyDoc_STRVAR(operator_doc,
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5 "Operator interface.\n\
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6 \n\
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7 This module exports a set of functions implemented in C corresponding\n\
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8 to the intrinsic operators of Python. For example, operator.add(x, y)\n\
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9 is equivalent to the expression x+y. The function names are those\n\
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10 used for special methods; variants without leading and trailing\n\
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11 '__' are also provided for convenience.");
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12
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13 #define spam1(OP,AOP) static PyObject *OP(PyObject *s, PyObject *a1) { \
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14 return AOP(a1); }
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15
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16 #define spam2(OP,AOP) static PyObject *OP(PyObject *s, PyObject *a) { \
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17 PyObject *a1, *a2; \
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18 if(! PyArg_UnpackTuple(a,#OP,2,2,&a1,&a2)) return NULL; \
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19 return AOP(a1,a2); }
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20
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21 #define spamoi(OP,AOP) static PyObject *OP(PyObject *s, PyObject *a) { \
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22 PyObject *a1; int a2; \
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23 if(! PyArg_ParseTuple(a,"Oi:" #OP,&a1,&a2)) return NULL; \
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24 return AOP(a1,a2); }
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25
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26 #define spam2n(OP,AOP) static PyObject *OP(PyObject *s, PyObject *a) { \
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27 PyObject *a1, *a2; \
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28 if(! PyArg_UnpackTuple(a,#OP,2,2,&a1,&a2)) return NULL; \
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29 if(-1 == AOP(a1,a2)) return NULL; \
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30 Py_INCREF(Py_None); \
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31 return Py_None; }
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32
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33 #define spam3n(OP,AOP) static PyObject *OP(PyObject *s, PyObject *a) { \
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34 PyObject *a1, *a2, *a3; \
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35 if(! PyArg_UnpackTuple(a,#OP,3,3,&a1,&a2,&a3)) return NULL; \
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36 if(-1 == AOP(a1,a2,a3)) return NULL; \
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37 Py_INCREF(Py_None); \
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38 return Py_None; }
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39
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40 #define spami(OP,AOP) static PyObject *OP(PyObject *s, PyObject *a1) { \
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41 long r; \
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42 if(-1 == (r=AOP(a1))) return NULL; \
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43 return PyBool_FromLong(r); }
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44
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45 #define spami2(OP,AOP) static PyObject *OP(PyObject *s, PyObject *a) { \
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46 PyObject *a1, *a2; long r; \
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47 if(! PyArg_UnpackTuple(a,#OP,2,2,&a1,&a2)) return NULL; \
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48 if(-1 == (r=AOP(a1,a2))) return NULL; \
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49 return PyInt_FromLong(r); }
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50
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51 #define spamn2(OP,AOP) static PyObject *OP(PyObject *s, PyObject *a) { \
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52 PyObject *a1, *a2; Py_ssize_t r; \
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53 if(! PyArg_UnpackTuple(a,#OP,2,2,&a1,&a2)) return NULL; \
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54 if(-1 == (r=AOP(a1,a2))) return NULL; \
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55 return PyInt_FromSsize_t(r); }
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56
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57 #define spami2b(OP,AOP) static PyObject *OP(PyObject *s, PyObject *a) { \
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58 PyObject *a1, *a2; long r; \
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59 if(! PyArg_UnpackTuple(a,#OP,2,2,&a1,&a2)) return NULL; \
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60 if(-1 == (r=AOP(a1,a2))) return NULL; \
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61 return PyBool_FromLong(r); }
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62
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63 #define spamrc(OP,A) static PyObject *OP(PyObject *s, PyObject *a) { \
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64 PyObject *a1, *a2; \
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65 if(! PyArg_UnpackTuple(a,#OP,2,2,&a1,&a2)) return NULL; \
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66 return PyObject_RichCompare(a1,a2,A); }
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67
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68 /* Deprecated operators that need warnings. */
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69 static int
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70 op_isCallable(PyObject *x)
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71 {
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72 if (PyErr_WarnPy3k("operator.isCallable() is not supported in 3.x. "
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73 "Use hasattr(obj, '__call__').", 1) < 0)
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74 return -1;
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75 return PyCallable_Check(x);
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76 }
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77
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78 static int
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79 op_sequenceIncludes(PyObject *seq, PyObject* ob)
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80 {
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81 if (PyErr_WarnPy3k("operator.sequenceIncludes() is not supported "
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82 "in 3.x. Use operator.contains().", 1) < 0)
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83 return -1;
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84 return PySequence_Contains(seq, ob);
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85 }
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86
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87 spami(isCallable , op_isCallable)
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88 spami(isNumberType , PyNumber_Check)
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89 spami(truth , PyObject_IsTrue)
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90 spam2(op_add , PyNumber_Add)
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91 spam2(op_sub , PyNumber_Subtract)
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92 spam2(op_mul , PyNumber_Multiply)
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93 spam2(op_div , PyNumber_Divide)
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94 spam2(op_floordiv , PyNumber_FloorDivide)
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95 spam2(op_truediv , PyNumber_TrueDivide)
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96 spam2(op_mod , PyNumber_Remainder)
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97 spam1(op_neg , PyNumber_Negative)
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98 spam1(op_pos , PyNumber_Positive)
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99 spam1(op_abs , PyNumber_Absolute)
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100 spam1(op_inv , PyNumber_Invert)
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101 spam1(op_invert , PyNumber_Invert)
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102 spam2(op_lshift , PyNumber_Lshift)
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103 spam2(op_rshift , PyNumber_Rshift)
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104 spami(op_not_ , PyObject_Not)
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105 spam2(op_and_ , PyNumber_And)
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106 spam2(op_xor , PyNumber_Xor)
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107 spam2(op_or_ , PyNumber_Or)
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108 spam2(op_iadd , PyNumber_InPlaceAdd)
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109 spam2(op_isub , PyNumber_InPlaceSubtract)
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110 spam2(op_imul , PyNumber_InPlaceMultiply)
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111 spam2(op_idiv , PyNumber_InPlaceDivide)
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112 spam2(op_ifloordiv , PyNumber_InPlaceFloorDivide)
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113 spam2(op_itruediv , PyNumber_InPlaceTrueDivide)
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114 spam2(op_imod , PyNumber_InPlaceRemainder)
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115 spam2(op_ilshift , PyNumber_InPlaceLshift)
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116 spam2(op_irshift , PyNumber_InPlaceRshift)
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117 spam2(op_iand , PyNumber_InPlaceAnd)
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118 spam2(op_ixor , PyNumber_InPlaceXor)
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119 spam2(op_ior , PyNumber_InPlaceOr)
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120 spami(isSequenceType , PySequence_Check)
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121 spam2(op_concat , PySequence_Concat)
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122 spamoi(op_repeat , PySequence_Repeat)
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123 spam2(op_iconcat , PySequence_InPlaceConcat)
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124 spamoi(op_irepeat , PySequence_InPlaceRepeat)
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125 spami2b(op_contains , PySequence_Contains)
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126 spami2b(sequenceIncludes, op_sequenceIncludes)
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127 spamn2(indexOf , PySequence_Index)
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128 spamn2(countOf , PySequence_Count)
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129 spami(isMappingType , PyMapping_Check)
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130 spam2(op_getitem , PyObject_GetItem)
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131 spam2n(op_delitem , PyObject_DelItem)
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132 spam3n(op_setitem , PyObject_SetItem)
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133 spamrc(op_lt , Py_LT)
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134 spamrc(op_le , Py_LE)
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135 spamrc(op_eq , Py_EQ)
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136 spamrc(op_ne , Py_NE)
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137 spamrc(op_gt , Py_GT)
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138 spamrc(op_ge , Py_GE)
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139
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140 static PyObject*
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141 op_pow(PyObject *s, PyObject *a)
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142 {
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143 PyObject *a1, *a2;
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144 if (PyArg_UnpackTuple(a,"pow", 2, 2, &a1, &a2))
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145 return PyNumber_Power(a1, a2, Py_None);
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146 return NULL;
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147 }
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148
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149 static PyObject*
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150 op_ipow(PyObject *s, PyObject *a)
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151 {
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152 PyObject *a1, *a2;
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153 if (PyArg_UnpackTuple(a,"ipow", 2, 2, &a1, &a2))
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154 return PyNumber_InPlacePower(a1, a2, Py_None);
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155 return NULL;
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156 }
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157
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158 static PyObject *
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159 op_index(PyObject *s, PyObject *a)
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160 {
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161 return PyNumber_Index(a);
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162 }
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163
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164 static PyObject*
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165 is_(PyObject *s, PyObject *a)
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166 {
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167 PyObject *a1, *a2, *result = NULL;
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168 if (PyArg_UnpackTuple(a,"is_", 2, 2, &a1, &a2)) {
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169 result = (a1 == a2) ? Py_True : Py_False;
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170 Py_INCREF(result);
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171 }
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172 return result;
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173 }
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174
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175 static PyObject*
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176 is_not(PyObject *s, PyObject *a)
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177 {
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178 PyObject *a1, *a2, *result = NULL;
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179 if (PyArg_UnpackTuple(a,"is_not", 2, 2, &a1, &a2)) {
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180 result = (a1 != a2) ? Py_True : Py_False;
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181 Py_INCREF(result);
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182 }
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183 return result;
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184 }
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185
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186 static PyObject*
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187 op_getslice(PyObject *s, PyObject *a)
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188 {
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189 PyObject *a1;
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190 Py_ssize_t a2, a3;
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191
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192 if (!PyArg_ParseTuple(a, "Onn:getslice", &a1, &a2, &a3))
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193 return NULL;
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194 return PySequence_GetSlice(a1, a2, a3);
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195 }
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196
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197 static PyObject*
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198 op_setslice(PyObject *s, PyObject *a)
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199 {
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200 PyObject *a1, *a4;
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201 Py_ssize_t a2, a3;
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202
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203 if (!PyArg_ParseTuple(a, "OnnO:setslice", &a1, &a2, &a3, &a4))
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204 return NULL;
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205
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206 if (-1 == PySequence_SetSlice(a1, a2, a3, a4))
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207 return NULL;
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208
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209 Py_RETURN_NONE;
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210 }
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211
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212 static PyObject*
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213 op_delslice(PyObject *s, PyObject *a)
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214 {
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215 PyObject *a1;
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216 Py_ssize_t a2, a3;
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217
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218 if (!PyArg_ParseTuple(a, "Onn:delslice", &a1, &a2, &a3))
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219 return NULL;
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220
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221 if (-1 == PySequence_DelSlice(a1, a2, a3))
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222 return NULL;
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223
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224 Py_RETURN_NONE;
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225 }
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226
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227 #undef spam1
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228 #undef spam2
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229 #undef spam1o
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230 #undef spam1o
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231 #define spam1(OP,DOC) {#OP, OP, METH_VARARGS, PyDoc_STR(DOC)},
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232 #define spam2(OP,ALTOP,DOC) {#OP, op_##OP, METH_VARARGS, PyDoc_STR(DOC)}, \
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233 {#ALTOP, op_##OP, METH_VARARGS, PyDoc_STR(DOC)},
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234 #define spam1o(OP,DOC) {#OP, OP, METH_O, PyDoc_STR(DOC)},
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235 #define spam2o(OP,ALTOP,DOC) {#OP, op_##OP, METH_O, PyDoc_STR(DOC)}, \
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236 {#ALTOP, op_##OP, METH_O, PyDoc_STR(DOC)},
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237
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238 static struct PyMethodDef operator_methods[] = {
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239
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240 spam1o(isCallable,
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241 "isCallable(a) -- Same as callable(a).")
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242 spam1o(isNumberType,
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243 "isNumberType(a) -- Return True if a has a numeric type, False otherwise.")
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244 spam1o(isSequenceType,
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245 "isSequenceType(a) -- Return True if a has a sequence type, False otherwise.")
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246 spam1o(truth,
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247 "truth(a) -- Return True if a is true, False otherwise.")
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248 spam2(contains,__contains__,
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249 "contains(a, b) -- Same as b in a (note reversed operands).")
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250 spam1(sequenceIncludes,
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251 "sequenceIncludes(a, b) -- Same as b in a (note reversed operands; deprecated).")
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252 spam1(indexOf,
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253 "indexOf(a, b) -- Return the first index of b in a.")
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254 spam1(countOf,
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255 "countOf(a, b) -- Return the number of times b occurs in a.")
27044
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Raymond Hettinger <python@rcn.com>
parents: 26818
diff changeset
256 spam1o(isMappingType,
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Guido van Rossum <guido@python.org>
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257 "isMappingType(a) -- Return True if a has a mapping type, False otherwise.")
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parents:
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258
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Raymond Hettinger <python@rcn.com>
parents: 27044
diff changeset
259 spam1(is_, "is_(a, b) -- Same as a is b.")
e83a42a90df1 SF patch #670423: Add missing identity tests to operator.c
Raymond Hettinger <python@rcn.com>
parents: 27044
diff changeset
260 spam1(is_not, "is_not(a, b) -- Same as a is not b.")
39463
6cafdc81cfde Patch #1538606, Patch to fix __index__() clipping.
Neal Norwitz <nnorwitz@gmail.com>
parents: 37919
diff changeset
261 spam2o(index, __index__, "index(a) -- Same as a.__index__()")
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Guido van Rossum <guido@python.org>
parents: 8406
diff changeset
262 spam2(add,__add__, "add(a, b) -- Same as a + b.")
4064b6729537 Add an alias (and preferred name) "contains" for "sequenceIncludes".
Guido van Rossum <guido@python.org>
parents: 8406
diff changeset
263 spam2(sub,__sub__, "sub(a, b) -- Same as a - b.")
4064b6729537 Add an alias (and preferred name) "contains" for "sequenceIncludes".
Guido van Rossum <guido@python.org>
parents: 8406
diff changeset
264 spam2(mul,__mul__, "mul(a, b) -- Same as a * b.")
19111
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Fred Drake <fdrake@acm.org>
parents: 14654
diff changeset
265 spam2(div,__div__, "div(a, b) -- Same as a / b when __future__.division is not in effect.")
6ba441507220 Add wrappers around the rich-comparison operations.
Fred Drake <fdrake@acm.org>
parents: 14654
diff changeset
266 spam2(floordiv,__floordiv__, "floordiv(a, b) -- Same as a // b.")
6ba441507220 Add wrappers around the rich-comparison operations.
Fred Drake <fdrake@acm.org>
parents: 14654
diff changeset
267 spam2(truediv,__truediv__, "truediv(a, b) -- Same as a / b when __future__.division is in effect.")
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Guido van Rossum <guido@python.org>
parents: 8406
diff changeset
268 spam2(mod,__mod__, "mod(a, b) -- Same as a % b.")
27044
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Raymond Hettinger <python@rcn.com>
parents: 26818
diff changeset
269 spam2o(neg,__neg__, "neg(a) -- Same as -a.")
23280a64288e SF patch 660559: Use METH_O and METH_NOARGS where possible
Raymond Hettinger <python@rcn.com>
parents: 26818
diff changeset
270 spam2o(pos,__pos__, "pos(a) -- Same as +a.")
23280a64288e SF patch 660559: Use METH_O and METH_NOARGS where possible
Raymond Hettinger <python@rcn.com>
parents: 26818
diff changeset
271 spam2o(abs,__abs__, "abs(a) -- Same as abs(a).")
23280a64288e SF patch 660559: Use METH_O and METH_NOARGS where possible
Raymond Hettinger <python@rcn.com>
parents: 26818
diff changeset
272 spam2o(inv,__inv__, "inv(a) -- Same as ~a.")
23280a64288e SF patch 660559: Use METH_O and METH_NOARGS where possible
Raymond Hettinger <python@rcn.com>
parents: 26818
diff changeset
273 spam2o(invert,__invert__, "invert(a) -- Same as ~a.")
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Guido van Rossum <guido@python.org>
parents: 8406
diff changeset
274 spam2(lshift,__lshift__, "lshift(a, b) -- Same as a << b.")
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Guido van Rossum <guido@python.org>
parents: 8406
diff changeset
275 spam2(rshift,__rshift__, "rshift(a, b) -- Same as a >> b.")
27044
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Raymond Hettinger <python@rcn.com>
parents: 26818
diff changeset
276 spam2o(not_,__not__, "not_(a) -- Same as not a.")
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parents: 8406
diff changeset
277 spam2(and_,__and__, "and_(a, b) -- Same as a & b.")
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Guido van Rossum <guido@python.org>
parents: 8406
diff changeset
278 spam2(xor,__xor__, "xor(a, b) -- Same as a ^ b.")
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Guido van Rossum <guido@python.org>
parents: 8406
diff changeset
279 spam2(or_,__or__, "or_(a, b) -- Same as a | b.")
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diff changeset
280 spam2(iadd,__iadd__, "a = iadd(a, b) -- Same as a += b.")
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diff changeset
281 spam2(isub,__isub__, "a = isub(a, b) -- Same as a -= b.")
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parents: 47527
diff changeset
282 spam2(imul,__imul__, "a = imul(a, b) -- Same as a *= b.")
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parents: 47527
diff changeset
283 spam2(idiv,__idiv__, "a = idiv(a, b) -- Same as a /= b when __future__.division is not in effect.")
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parents: 47527
diff changeset
284 spam2(ifloordiv,__ifloordiv__, "a = ifloordiv(a, b) -- Same as a //= b.")
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Georg Brandl <georg@python.org>
parents: 47527
diff changeset
285 spam2(itruediv,__itruediv__, "a = itruediv(a, b) -- Same as a /= b when __future__.division is in effect.")
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parents: 47527
diff changeset
286 spam2(imod,__imod__, "a = imod(a, b) -- Same as a %= b.")
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parents: 47527
diff changeset
287 spam2(ilshift,__ilshift__, "a = ilshift(a, b) -- Same as a <<= b.")
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parents: 47527
diff changeset
288 spam2(irshift,__irshift__, "a = irshift(a, b) -- Same as a >>= b.")
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parents: 47527
diff changeset
289 spam2(iand,__iand__, "a = iand(a, b) -- Same as a &= b.")
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diff changeset
290 spam2(ixor,__ixor__, "a = ixor(a, b) -- Same as a ^= b.")
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291 spam2(ior,__ior__, "a = ior(a, b) -- Same as a |= b.")
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Guido van Rossum <guido@python.org>
parents: 3976
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292 spam2(concat,__concat__,
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parents: 8406
diff changeset
293 "concat(a, b) -- Same as a + b, for a and b sequences.")
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Guido van Rossum <guido@python.org>
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294 spam2(repeat,__repeat__,
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Guido van Rossum <guido@python.org>
parents: 4104
diff changeset
295 "repeat(a, b) -- Return a * b, where a is a sequence, and b is an integer.")
36152
f9281283b109 adding in-place operators to the operator module.
Armin Rigo <arigo@tunes.org>
parents: 36149
diff changeset
296 spam2(iconcat,__iconcat__,
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297 "a = iconcat(a, b) -- Same as a += b, for a and b sequences.")
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Armin Rigo <arigo@tunes.org>
parents: 36149
diff changeset
298 spam2(irepeat,__irepeat__,
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299 "a = irepeat(a, b) -- Same as a *= b, where a is a sequence, and b is an integer.")
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300 spam2(getitem,__getitem__,
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301 "getitem(a, b) -- Same as a[b].")
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302 spam2(setitem,__setitem__,
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parents: 8406
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303 "setitem(a, b, c) -- Same as a[b] = c.")
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Guido van Rossum <guido@python.org>
parents: 4033
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304 spam2(delitem,__delitem__,
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parents: 8406
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305 "delitem(a, b) -- Same as del a[b].")
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parents: 36149
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306 spam2(pow,__pow__, "pow(a, b) -- Same as a ** b.")
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307 spam2(ipow,__ipow__, "a = ipow(a, b) -- Same as a **= b.")
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308 spam2(getslice,__getslice__,
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parents: 8406
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309 "getslice(a, b, c) -- Same as a[b:c].")
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310 spam2(setslice,__setslice__,
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311 "setslice(a, b, c, d) -- Same as a[b:c] = d.")
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Guido van Rossum <guido@python.org>
parents: 4033
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312 spam2(delslice,__delslice__,
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Guido van Rossum <guido@python.org>
parents: 8406
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313 "delslice(a, b, c) -- Same as del a[b:c].")
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Fred Drake <fdrake@acm.org>
parents: 14654
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314 spam2(lt,__lt__, "lt(a, b) -- Same as a<b.")
6ba441507220 Add wrappers around the rich-comparison operations.
Fred Drake <fdrake@acm.org>
parents: 14654
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315 spam2(le,__le__, "le(a, b) -- Same as a<=b.")
6ba441507220 Add wrappers around the rich-comparison operations.
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parents: 14654
diff changeset
316 spam2(eq,__eq__, "eq(a, b) -- Same as a==b.")
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Fred Drake <fdrake@acm.org>
parents: 14654
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317 spam2(ne,__ne__, "ne(a, b) -- Same as a!=b.")
6ba441507220 Add wrappers around the rich-comparison operations.
Fred Drake <fdrake@acm.org>
parents: 14654
diff changeset
318 spam2(gt,__gt__, "gt(a, b) -- Same as a>b.")
6ba441507220 Add wrappers around the rich-comparison operations.
Fred Drake <fdrake@acm.org>
parents: 14654
diff changeset
319 spam2(ge,__ge__, "ge(a, b) -- Same as a>=b.")
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320
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321 {NULL, NULL} /* sentinel */
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322
0d54a14ef0b8 Operators like __add__
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323 };
0d54a14ef0b8 Operators like __add__
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parents:
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324
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325 /* itemgetter object **********************************************************/
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326
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327 typedef struct {
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328 PyObject_HEAD
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329 Py_ssize_t nitems;
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330 PyObject *item;
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331 } itemgetterobject;
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332
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333 static PyTypeObject itemgetter_type;
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334
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335 static PyObject *
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336 itemgetter_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
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337 {
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338 itemgetterobject *ig;
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339 PyObject *item;
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340 Py_ssize_t nitems;
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341
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342 if (!_PyArg_NoKeywords("itemgetter()", kwds))
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343 return NULL;
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344
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345 nitems = PyTuple_GET_SIZE(args);
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346 if (nitems <= 1) {
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347 if (!PyArg_UnpackTuple(args, "itemgetter", 1, 1, &item))
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348 return NULL;
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349 } else
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350 item = args;
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351
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352 /* create itemgetterobject structure */
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353 ig = PyObject_GC_New(itemgetterobject, &itemgetter_type);
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354 if (ig == NULL)
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355 return NULL;
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356
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357 Py_INCREF(item);
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358 ig->item = item;
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359 ig->nitems = nitems;
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360
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361 PyObject_GC_Track(ig);
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362 return (PyObject *)ig;
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363 }
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364
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365 static void
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366 itemgetter_dealloc(itemgetterobject *ig)
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367 {
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368 PyObject_GC_UnTrack(ig);
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369 Py_XDECREF(ig->item);
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370 PyObject_GC_Del(ig);
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371 }
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372
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373 static int
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374 itemgetter_traverse(itemgetterobject *ig, visitproc visit, void *arg)
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375 {
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376 Py_VISIT(ig->item);
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377 return 0;
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378 }
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379
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380 static PyObject *
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381 itemgetter_call(itemgetterobject *ig, PyObject *args, PyObject *kw)
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382 {
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383 PyObject *obj, *result;
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384 Py_ssize_t i, nitems=ig->nitems;
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385
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386 if (!PyArg_UnpackTuple(args, "itemgetter", 1, 1, &obj))
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387 return NULL;
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388 if (nitems == 1)
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389 return PyObject_GetItem(obj, ig->item);
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390
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391 assert(PyTuple_Check(ig->item));
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392 assert(PyTuple_GET_SIZE(ig->item) == nitems);
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393
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394 result = PyTuple_New(nitems);
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395 if (result == NULL)
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396 return NULL;
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397
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398 for (i=0 ; i < nitems ; i++) {
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399 PyObject *item, *val;
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400 item = PyTuple_GET_ITEM(ig->item, i);
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401 val = PyObject_GetItem(obj, item);
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402 if (val == NULL) {
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403 Py_DECREF(result);
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404 return NULL;
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405 }
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406 PyTuple_SET_ITEM(result, i, val);
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407 }
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408 return result;
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409 }
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410
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411 PyDoc_STRVAR(itemgetter_doc,
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412 "itemgetter(item, ...) --> itemgetter object\n\
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413 \n\
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414 Return a callable object that fetches the given item(s) from its operand.\n\
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415 After, f=itemgetter(2), the call f(r) returns r[2].\n\
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416 After, g=itemgetter(2,5,3), the call g(r) returns (r[2], r[5], r[3])");
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417
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418 static PyTypeObject itemgetter_type = {
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419 PyVarObject_HEAD_INIT(NULL, 0)
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420 "operator.itemgetter", /* tp_name */
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421 sizeof(itemgetterobject), /* tp_basicsize */
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422 0, /* tp_itemsize */
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423 /* methods */
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424 (destructor)itemgetter_dealloc, /* tp_dealloc */
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425 0, /* tp_print */
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426 0, /* tp_getattr */
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427 0, /* tp_setattr */
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428 0, /* tp_compare */
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429 0, /* tp_repr */
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430 0, /* tp_as_number */
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431 0, /* tp_as_sequence */
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432 0, /* tp_as_mapping */
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433 0, /* tp_hash */
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434 (ternaryfunc)itemgetter_call, /* tp_call */
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435 0, /* tp_str */
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436 PyObject_GenericGetAttr, /* tp_getattro */
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437 0, /* tp_setattro */
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438 0, /* tp_as_buffer */
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439 Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC, /* tp_flags */
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440 itemgetter_doc, /* tp_doc */
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441 (traverseproc)itemgetter_traverse, /* tp_traverse */
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442 0, /* tp_clear */
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443 0, /* tp_richcompare */
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444 0, /* tp_weaklistoffset */
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445 0, /* tp_iter */
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446 0, /* tp_iternext */
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447 0, /* tp_methods */
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448 0, /* tp_members */
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449 0, /* tp_getset */
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450 0, /* tp_base */
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451 0, /* tp_dict */
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452 0, /* tp_descr_get */
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453 0, /* tp_descr_set */
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454 0, /* tp_dictoffset */
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455 0, /* tp_init */
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456 0, /* tp_alloc */
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457 itemgetter_new, /* tp_new */
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458 0, /* tp_free */
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459 };
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460
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461
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462 /* attrgetter object **********************************************************/
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463
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464 typedef struct {
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465 PyObject_HEAD
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466 Py_ssize_t nattrs;
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467 PyObject *attr;
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468 } attrgetterobject;
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469
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470 static PyTypeObject attrgetter_type;
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471
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472 static PyObject *
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473 attrgetter_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
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474 {
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475 attrgetterobject *ag;
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476 PyObject *attr;
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477 Py_ssize_t nattrs;
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478
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479 if (!_PyArg_NoKeywords("attrgetter()", kwds))
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480 return NULL;
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481
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482 nattrs = PyTuple_GET_SIZE(args);
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483 if (nattrs <= 1) {
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484 if (!PyArg_UnpackTuple(args, "attrgetter", 1, 1, &attr))
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485 return NULL;
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486 } else
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487 attr = args;
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488
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489 /* create attrgetterobject structure */
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490 ag = PyObject_GC_New(attrgetterobject, &attrgetter_type);
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491 if (ag == NULL)
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492 return NULL;
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493
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494 Py_INCREF(attr);
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495 ag->attr = attr;
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496 ag->nattrs = nattrs;
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497
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498 PyObject_GC_Track(ag);
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499 return (PyObject *)ag;
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500 }
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501
456e274f8602 As discussed on python-dev, added two extractor functions to the
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502 static void
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503 attrgetter_dealloc(attrgetterobject *ag)
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504 {
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505 PyObject_GC_UnTrack(ag);
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506 Py_XDECREF(ag->attr);
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507 PyObject_GC_Del(ag);
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508 }
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509
456e274f8602 As discussed on python-dev, added two extractor functions to the
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diff changeset
510 static int
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511 attrgetter_traverse(attrgetterobject *ag, visitproc visit, void *arg)
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512 {
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513 Py_VISIT(ag->attr);
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514 return 0;
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515 }
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516
456e274f8602 As discussed on python-dev, added two extractor functions to the
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517 static PyObject *
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518 dotted_getattr(PyObject *obj, PyObject *attr)
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519 {
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520 char *s, *p;
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521
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522 #ifdef Py_USING_UNICODE
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523 if (PyUnicode_Check(attr)) {
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524 attr = _PyUnicode_AsDefaultEncodedString(attr, NULL);
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525 if (attr == NULL)
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526 return NULL;
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527 }
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528 #endif
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529
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530 if (!PyString_Check(attr)) {
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531 PyErr_SetString(PyExc_TypeError,
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532 "attribute name must be a string");
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533 return NULL;
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534 }
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535
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536 s = PyString_AS_STRING(attr);
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537 Py_INCREF(obj);
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538 for (;;) {
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diff changeset
539 PyObject *newobj, *str;
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540 p = strchr(s, '.');
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541 str = p ? PyString_FromStringAndSize(s, (p-s)) :
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542 PyString_FromString(s);
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543 if (str == NULL) {
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544 Py_DECREF(obj);
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545 return NULL;
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546 }
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547 newobj = PyObject_GetAttr(obj, str);
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548 Py_DECREF(str);
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549 Py_DECREF(obj);
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550 if (newobj == NULL)
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551 return NULL;
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552 obj = newobj;
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553 if (p == NULL) break;
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554 s = p+1;
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555 }
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556
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557 return obj;
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558 }
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559
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560 static PyObject *
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561 attrgetter_call(attrgetterobject *ag, PyObject *args, PyObject *kw)
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562 {
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563 PyObject *obj, *result;
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564 Py_ssize_t i, nattrs=ag->nattrs;
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565
61465
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566 if (!PyArg_UnpackTuple(args, "attrgetter", 1, 1, &obj))
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567 return NULL;
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568 if (ag->nattrs == 1)
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569 return dotted_getattr(obj, ag->attr);
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570
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571 assert(PyTuple_Check(ag->attr));
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572 assert(PyTuple_GET_SIZE(ag->attr) == nattrs);
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573
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574 result = PyTuple_New(nattrs);
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575 if (result == NULL)
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576 return NULL;
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577
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578 for (i=0 ; i < nattrs ; i++) {
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diff changeset
579 PyObject *attr, *val;
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580 attr = PyTuple_GET_ITEM(ag->attr, i);
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diff changeset
581 val = dotted_getattr(obj, attr);
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diff changeset
582 if (val == NULL) {
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583 Py_DECREF(result);
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diff changeset
584 return NULL;
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585 }
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diff changeset
586 PyTuple_SET_ITEM(result, i, val);
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diff changeset
587 }
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588 return result;
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589 }
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590
456e274f8602 As discussed on python-dev, added two extractor functions to the
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591 PyDoc_STRVAR(attrgetter_doc,
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592 "attrgetter(attr, ...) --> attrgetter object\n\
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593 \n\
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594 Return a callable object that fetches the given attribute(s) from its operand.\n\
ddc2276c247e operator.itemgetter() and operator.attrgetter() now support extraction
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595 After, f=attrgetter('name'), the call f(r) returns r.name.\n\
45487
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596 After, g=attrgetter('name', 'date'), the call g(r) returns (r.name, r.date).\n\
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597 After, h=attrgetter('name.first', 'name.last'), the call h(r) returns\n\
813c146858f7 #1826: allow dotted attribute paths in operator.attrgetter.
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598 (r.name.first, r.name.last).");
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599
456e274f8602 As discussed on python-dev, added two extractor functions to the
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600 static PyTypeObject attrgetter_type = {
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601 PyVarObject_HEAD_INIT(NULL, 0)
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602 "operator.attrgetter", /* tp_name */
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diff changeset
603 sizeof(attrgetterobject), /* tp_basicsize */
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604 0, /* tp_itemsize */
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diff changeset
605 /* methods */
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606 (destructor)attrgetter_dealloc, /* tp_dealloc */
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607 0, /* tp_print */
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608 0, /* tp_getattr */
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609 0, /* tp_setattr */
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610 0, /* tp_compare */
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611 0, /* tp_repr */
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612 0, /* tp_as_number */
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613 0, /* tp_as_sequence */
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614 0, /* tp_as_mapping */
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615 0, /* tp_hash */
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616 (ternaryfunc)attrgetter_call, /* tp_call */
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617 0, /* tp_str */
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618 PyObject_GenericGetAttr, /* tp_getattro */
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619 0, /* tp_setattro */
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620 0, /* tp_as_buffer */
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621 Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC, /* tp_flags */
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622 attrgetter_doc, /* tp_doc */
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623 (traverseproc)attrgetter_traverse, /* tp_traverse */
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624 0, /* tp_clear */
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625 0, /* tp_richcompare */
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626 0, /* tp_weaklistoffset */
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627 0, /* tp_iter */
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diff changeset
628 0, /* tp_iternext */
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629 0, /* tp_methods */
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630 0, /* tp_members */
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631 0, /* tp_getset */
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632 0, /* tp_base */
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633 0, /* tp_dict */
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634 0, /* tp_descr_get */
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635 0, /* tp_descr_set */
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636 0, /* tp_dictoffset */
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637 0, /* tp_init */
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638 0, /* tp_alloc */
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639 attrgetter_new, /* tp_new */
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640 0, /* tp_free */
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641 };
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642
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643
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644 /* methodcaller object **********************************************************/
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645
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646 typedef struct {
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647 PyObject_HEAD
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648 PyObject *name;
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649 PyObject *args;
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650 PyObject *kwds;
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651 } methodcallerobject;
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652
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653 static PyTypeObject methodcaller_type;
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654
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655 static PyObject *
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656 methodcaller_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
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657 {
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658 methodcallerobject *mc;
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659 PyObject *name, *newargs;
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660
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661 if (PyTuple_GET_SIZE(args) < 1) {
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662 PyErr_SetString(PyExc_TypeError, "methodcaller needs at least "
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663 "one argument, the method name");
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664 return NULL;
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665 }
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666
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667 /* create methodcallerobject structure */
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668 mc = PyObject_GC_New(methodcallerobject, &methodcaller_type);
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669 if (mc == NULL)
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670 return NULL;
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671
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672 newargs = PyTuple_GetSlice(args, 1, PyTuple_GET_SIZE(args));
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673 if (newargs == NULL) {
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674 Py_DECREF(mc);
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675 return NULL;
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676 }
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677 mc->args = newargs;
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678
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679 name = PyTuple_GET_ITEM(args, 0);
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680 Py_INCREF(name);
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681 mc->name = name;
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682
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683 Py_XINCREF(kwds);
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684 mc->kwds = kwds;
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685
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686 PyObject_GC_Track(mc);
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687 return (PyObject *)mc;
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688 }
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689
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690 static void
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691 methodcaller_dealloc(methodcallerobject *mc)
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692 {
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693 PyObject_GC_UnTrack(mc);
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694 Py_XDECREF(mc->name);
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695 Py_XDECREF(mc->args);
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696 Py_XDECREF(mc->kwds);
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697 PyObject_GC_Del(mc);
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698 }
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699
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700 static int
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701 methodcaller_traverse(methodcallerobject *mc, visitproc visit, void *arg)
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702 {
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703 Py_VISIT(mc->args);
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704 Py_VISIT(mc->kwds);
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705 return 0;
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706 }
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707
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708 static PyObject *
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709 methodcaller_call(methodcallerobject *mc, PyObject *args, PyObject *kw)
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710 {
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711 PyObject *method, *obj, *result;
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712
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713 if (!PyArg_UnpackTuple(args, "methodcaller", 1, 1, &obj))
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714 return NULL;
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715 method = PyObject_GetAttr(obj, mc->name);
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716 if (method == NULL)
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717 return NULL;
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718 result = PyObject_Call(method, mc->args, mc->kwds);
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719 Py_DECREF(method);
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720 return result;
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721 }
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722
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723 PyDoc_STRVAR(methodcaller_doc,
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724 "methodcaller(name, ...) --> methodcaller object\n\
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725 \n\
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726 Return a callable object that calls the given method on its operand.\n\
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727 After, f = methodcaller('name'), the call f(r) returns r.name().\n\
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728 After, g = methodcaller('name', 'date', foo=1), the call g(r) returns\n\
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729 r.name('date', foo=1).");
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730
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731 static PyTypeObject methodcaller_type = {
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732 PyVarObject_HEAD_INIT(NULL, 0)
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733 "operator.methodcaller", /* tp_name */
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734 sizeof(methodcallerobject), /* tp_basicsize */
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735 0, /* tp_itemsize */
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736 /* methods */
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737 (destructor)methodcaller_dealloc, /* tp_dealloc */
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738 0, /* tp_print */
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739 0, /* tp_getattr */
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740 0, /* tp_setattr */
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741 0, /* tp_compare */
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742 0, /* tp_repr */
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743 0, /* tp_as_number */
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744 0, /* tp_as_sequence */
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745 0, /* tp_as_mapping */
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746 0, /* tp_hash */
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747 (ternaryfunc)methodcaller_call, /* tp_call */
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748 0, /* tp_str */
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749 PyObject_GenericGetAttr, /* tp_getattro */
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750 0, /* tp_setattro */
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751 0, /* tp_as_buffer */
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752 Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC,/* tp_flags */
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753 methodcaller_doc, /* tp_doc */
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754 (traverseproc)methodcaller_traverse, /* tp_traverse */
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755 0, /* tp_clear */
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756 0, /* tp_richcompare */
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757 0, /* tp_weaklistoffset */
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758 0, /* tp_iter */
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759 0, /* tp_iternext */
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760 0, /* tp_methods */
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761 0, /* tp_members */
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762 0, /* tp_getset */
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763 0, /* tp_base */
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764 0, /* tp_dict */
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765 0, /* tp_descr_get */
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766 0, /* tp_descr_set */
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767 0, /* tp_dictoffset */
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768 0, /* tp_init */
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769 0, /* tp_alloc */
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770 methodcaller_new, /* tp_new */
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771 0, /* tp_free */
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Georg Brandl <georg@python.org>
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772 };
c126bd9b505b #1506171: added operator.methodcaller().
Georg Brandl <georg@python.org>
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773
c126bd9b505b #1506171: added operator.methodcaller().
Georg Brandl <georg@python.org>
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774
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Guido van Rossum <guido@python.org>
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775 /* Initialization function for the module (*must* be called initoperator) */
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776
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Mark Hammond <mhammond@skippinet.com.au>
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777 PyMODINIT_FUNC
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Thomas Wouters <thomas@python.org>
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778 initoperator(void)
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779 {
61465
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780 PyObject *m;
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781
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782 /* Create the module and add the functions */
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783 m = Py_InitModule4("operator", operator_methods, operator_doc,
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784 (PyObject*)NULL, PYTHON_API_VERSION);
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785 if (m == NULL)
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786 return;
31052
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Raymond Hettinger <python@rcn.com>
parents: 27290
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787
61465
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788 if (PyType_Ready(&itemgetter_type) < 0)
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789 return;
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790 Py_INCREF(&itemgetter_type);
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791 PyModule_AddObject(m, "itemgetter", (PyObject *)&itemgetter_type);
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Raymond Hettinger <python@rcn.com>
parents: 27290
diff changeset
792
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793 if (PyType_Ready(&attrgetter_type) < 0)
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794 return;
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795 Py_INCREF(&attrgetter_type);
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796 PyModule_AddObject(m, "attrgetter", (PyObject *)&attrgetter_type);
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Georg Brandl <georg@python.org>
parents: 45487
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797
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798 if (PyType_Ready(&methodcaller_type) < 0)
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799 return;
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800 Py_INCREF(&methodcaller_type);
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801 PyModule_AddObject(m, "methodcaller", (PyObject *)&methodcaller_type);
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802 }