Mercurial > cpython-lru_cache-weakref

annotate Doc/includes/noddy3.c @ 54294:dba767bc3155 legacy-trunk

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remove mention of old ctypes version
author Benjamin Peterson <benjamin@python.org>
date Sat, 23 May 2009 20:59:09 +0000
parents 52294af4b663
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 #include <Python.h>
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2 #include "structmember.h"
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3
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4 typedef struct {
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5 PyObject_HEAD
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6 PyObject *first;
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7 PyObject *last;
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8 int number;
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9 } Noddy;
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10
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11 static void
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12 Noddy_dealloc(Noddy* self)
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13 {
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14 Py_XDECREF(self->first);
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15 Py_XDECREF(self->last);
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16 self->ob_type->tp_free((PyObject*)self);
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17 }
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18
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19 static PyObject *
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20 Noddy_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
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21 {
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22 Noddy *self;
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23
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24 self = (Noddy *)type->tp_alloc(type, 0);
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25 if (self != NULL) {
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26 self->first = PyString_FromString("");
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27 if (self->first == NULL)
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28 {
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29 Py_DECREF(self);
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30 return NULL;
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31 }
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32
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33 self->last = PyString_FromString("");
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34 if (self->last == NULL)
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35 {
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36 Py_DECREF(self);
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37 return NULL;
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38 }
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39
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40 self->number = 0;
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41 }
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42
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43 return (PyObject *)self;
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44 }
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45
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46 static int
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47 Noddy_init(Noddy *self, PyObject *args, PyObject *kwds)
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48 {
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49 PyObject *first=NULL, *last=NULL, *tmp;
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50
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51 static char *kwlist[] = {"first", "last", "number", NULL};
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52
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53 if (! PyArg_ParseTupleAndKeywords(args, kwds, "|SSi", kwlist,
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54 &first, &last,
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55 &self->number))
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56 return -1;
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57
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58 if (first) {
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59 tmp = self->first;
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60 Py_INCREF(first);
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61 self->first = first;
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62 Py_DECREF(tmp);
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63 }
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64
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65 if (last) {
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66 tmp = self->last;
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67 Py_INCREF(last);
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68 self->last = last;
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69 Py_DECREF(tmp);
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70 }
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71
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72 return 0;
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73 }
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74
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75 static PyMemberDef Noddy_members[] = {
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76 {"number", T_INT, offsetof(Noddy, number), 0,
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77 "noddy number"},
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78 {NULL} /* Sentinel */
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79 };
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80
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81 static PyObject *
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82 Noddy_getfirst(Noddy *self, void *closure)
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83 {
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84 Py_INCREF(self->first);
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85 return self->first;
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86 }
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87
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88 static int
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89 Noddy_setfirst(Noddy *self, PyObject *value, void *closure)
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90 {
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91 if (value == NULL) {
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92 PyErr_SetString(PyExc_TypeError, "Cannot delete the first attribute");
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93 return -1;
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94 }
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95
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96 if (! PyString_Check(value)) {
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97 PyErr_SetString(PyExc_TypeError,
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98 "The first attribute value must be a string");
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99 return -1;
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100 }
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101
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102 Py_DECREF(self->first);
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103 Py_INCREF(value);
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104 self->first = value;
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105
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106 return 0;
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107 }
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108
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109 static PyObject *
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110 Noddy_getlast(Noddy *self, void *closure)
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111 {
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112 Py_INCREF(self->last);
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113 return self->last;
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114 }
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115
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116 static int
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117 Noddy_setlast(Noddy *self, PyObject *value, void *closure)
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118 {
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119 if (value == NULL) {
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120 PyErr_SetString(PyExc_TypeError, "Cannot delete the last attribute");
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121 return -1;
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122 }
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123
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124 if (! PyString_Check(value)) {
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125 PyErr_SetString(PyExc_TypeError,
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126 "The last attribute value must be a string");
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127 return -1;
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128 }
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129
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130 Py_DECREF(self->last);
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131 Py_INCREF(value);
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132 self->last = value;
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133
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134 return 0;
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135 }
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136
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137 static PyGetSetDef Noddy_getseters[] = {
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138 {"first",
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139 (getter)Noddy_getfirst, (setter)Noddy_setfirst,
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140 "first name",
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141 NULL},
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142 {"last",
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143 (getter)Noddy_getlast, (setter)Noddy_setlast,
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144 "last name",
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145 NULL},
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146 {NULL} /* Sentinel */
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147 };
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148
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149 static PyObject *
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150 Noddy_name(Noddy* self)
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151 {
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152 static PyObject *format = NULL;
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153 PyObject *args, *result;
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154
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155 if (format == NULL) {
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156 format = PyString_FromString("%s %s");
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157 if (format == NULL)
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158 return NULL;
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159 }
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160
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161 args = Py_BuildValue("OO", self->first, self->last);
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162 if (args == NULL)
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163 return NULL;
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164
47527
52294af4b663 This reverts r63675 based on the discussion in this thread:
Gregory P. Smith <greg@mad-scientist.com>
parents: 47294
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165 result = PyString_Format(format, args);
42604
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166 Py_DECREF(args);
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167
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168 return result;
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169 }
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170
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171 static PyMethodDef Noddy_methods[] = {
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172 {"name", (PyCFunction)Noddy_name, METH_NOARGS,
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173 "Return the name, combining the first and last name"
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174 },
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175 {NULL} /* Sentinel */
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176 };
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177
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178 static PyTypeObject NoddyType = {
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179 PyObject_HEAD_INIT(NULL)
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180 0, /*ob_size*/
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181 "noddy.Noddy", /*tp_name*/
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182 sizeof(Noddy), /*tp_basicsize*/
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183 0, /*tp_itemsize*/
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184 (destructor)Noddy_dealloc, /*tp_dealloc*/
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185 0, /*tp_print*/
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186 0, /*tp_getattr*/
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187 0, /*tp_setattr*/
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188 0, /*tp_compare*/
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189 0, /*tp_repr*/
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190 0, /*tp_as_number*/
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191 0, /*tp_as_sequence*/
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192 0, /*tp_as_mapping*/
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193 0, /*tp_hash */
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194 0, /*tp_call*/
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195 0, /*tp_str*/
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196 0, /*tp_getattro*/
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197 0, /*tp_setattro*/
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198 0, /*tp_as_buffer*/
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199 Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /*tp_flags*/
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200 "Noddy objects", /* tp_doc */
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201 0, /* tp_traverse */
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202 0, /* tp_clear */
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203 0, /* tp_richcompare */
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204 0, /* tp_weaklistoffset */
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205 0, /* tp_iter */
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206 0, /* tp_iternext */
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207 Noddy_methods, /* tp_methods */
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208 Noddy_members, /* tp_members */
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209 Noddy_getseters, /* tp_getset */
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210 0, /* tp_base */
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211 0, /* tp_dict */
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212 0, /* tp_descr_get */
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213 0, /* tp_descr_set */
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214 0, /* tp_dictoffset */
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215 (initproc)Noddy_init, /* tp_init */
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216 0, /* tp_alloc */
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217 Noddy_new, /* tp_new */
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218 };
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219
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220 static PyMethodDef module_methods[] = {
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221 {NULL} /* Sentinel */
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222 };
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223
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224 #ifndef PyMODINIT_FUNC /* declarations for DLL import/export */
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225 #define PyMODINIT_FUNC void
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226 #endif
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227 PyMODINIT_FUNC
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228 initnoddy3(void)
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229 {
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230 PyObject* m;
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231
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232 if (PyType_Ready(&NoddyType) < 0)
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233 return;
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234
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235 m = Py_InitModule3("noddy3", module_methods,
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236 "Example module that creates an extension type.");
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237
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238 if (m == NULL)
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239 return;
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240
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241 Py_INCREF(&NoddyType);
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242 PyModule_AddObject(m, "Noddy", (PyObject *)&NoddyType);
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243 }