Mercurial > cpython-lru_cache-weakref

annotate Objects/funcobject.c @ 1944:8e8fddcbdfd2 legacy-trunk

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Hopefully the last edits for 1.1
author Guido van Rossum <guido@python.org>
date Thu, 06 Oct 1994 16:15:09 +0000
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children 866c81068dbd
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1 /***********************************************************
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2 Copyright 1991, 1992, 1993, 1994 by Stichting Mathematisch Centrum,
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3 Amsterdam, The Netherlands.
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4
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5 All Rights Reserved
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6
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7 Permission to use, copy, modify, and distribute this software and its
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8 documentation for any purpose and without fee is hereby granted,
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9 provided that the above copyright notice appear in all copies and that
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10 both that copyright notice and this permission notice appear in
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11 supporting documentation, and that the names of Stichting Mathematisch
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12 Centrum or CWI not be used in advertising or publicity pertaining to
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13 distribution of the software without specific, written prior permission.
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14
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15 STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO
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16 THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
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17 FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE
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18 FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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19 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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20 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
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21 OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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22
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23 ******************************************************************/
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24
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25 /* Function object implementation */
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26
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27 #include "allobjects.h"
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28 #include "compile.h"
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29 #include "structmember.h"
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30
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31 object *
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32 newfuncobject(code, globals)
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33 object *code;
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34 object *globals;
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35 {
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36 funcobject *op = NEWOBJ(funcobject, &Functype);
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37 if (op != NULL) {
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38 INCREF(code);
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39 op->func_code = code;
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40 INCREF(globals);
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41 op->func_globals = globals;
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42 op->func_name = ((codeobject*)(op->func_code))->co_name;
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43 INCREF(op->func_name);
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44 op->func_argcount = -1; /* Unknown */
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45 op->func_argdefs = NULL; /* No default arguments */
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46 }
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47 return (object *)op;
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48 }
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49
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50 object *
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51 getfunccode(op)
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52 object *op;
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53 {
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54 if (!is_funcobject(op)) {
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55 err_badcall();
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56 return NULL;
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57 }
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58 return ((funcobject *) op) -> func_code;
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59 }
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60
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61 object *
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62 getfuncglobals(op)
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63 object *op;
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64 {
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65 if (!is_funcobject(op)) {
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66 err_badcall();
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67 return NULL;
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68 }
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69 return ((funcobject *) op) -> func_globals;
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70 }
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71
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72 object *
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73 getfuncargstuff(op, argcount_return)
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74 object *op;
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75 int *argcount_return;
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76 {
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77 if (!is_funcobject(op)) {
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78 err_badcall();
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79 return NULL;
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80 }
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81 *argcount_return = ((funcobject *) op) -> func_argcount;
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82 return ((funcobject *) op) -> func_argdefs;
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83 }
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84
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85 int
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86 setfuncargstuff(op, argcount, argdefs)
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87 object *op;
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88 int argcount;
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89 object *argdefs;
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90 {
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91 if (!is_funcobject(op) ||
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92 argdefs != NULL && !is_tupleobject(argdefs)) {
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93 err_badcall();
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94 return -1;
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95 }
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96 if (argdefs == None)
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97 argdefs = NULL;
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98 else if (is_tupleobject(argdefs))
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99 XINCREF(argdefs);
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100 else {
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101 err_setstr(SystemError, "non-tuple default args");
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102 return -1;
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103 }
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104 ((funcobject *) op) -> func_argcount = argcount;
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105 XDECREF(((funcobject *) op) -> func_argdefs);
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106 ((funcobject *) op) -> func_argdefs = argdefs;
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107 return 0;
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108 }
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109
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110 /* Methods */
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111
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112 #define OFF(x) offsetof(funcobject, x)
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113
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114 static struct memberlist func_memberlist[] = {
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115 {"func_code", T_OBJECT, OFF(func_code), READONLY},
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116 {"func_globals",T_OBJECT, OFF(func_globals), READONLY},
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117 {"func_name", T_OBJECT, OFF(func_name), READONLY},
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118 {"func_argcount",T_INT, OFF(func_argcount), READONLY},
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119 {"func_argdefs",T_OBJECT, OFF(func_argdefs), READONLY},
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120 {NULL} /* Sentinel */
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121 };
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122
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123 static object *
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124 func_getattr(op, name)
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125 funcobject *op;
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126 char *name;
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127 {
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128 return getmember((char *)op, func_memberlist, name);
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129 }
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130
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131 static void
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132 func_dealloc(op)
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133 funcobject *op;
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134 {
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135 DECREF(op->func_code);
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136 DECREF(op->func_globals);
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137 XDECREF(op->func_argdefs);
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138 DEL(op);
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139 }
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140
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141 static object*
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142 func_repr(op)
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143 funcobject *op;
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144 {
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145 char buf[140];
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146 if (op->func_name == None)
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147 sprintf(buf, "<anonymous function at %lx>", (long)op);
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148 else
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149 sprintf(buf, "<function %.100s at %lx>",
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150 getstringvalue(op->func_name),
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151 (long)op);
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152 return newstringobject(buf);
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153 }
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154
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155 static int
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156 func_compare(f, g)
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157 funcobject *f, *g;
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158 {
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159 int c;
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160 if (f->func_globals != g->func_globals)
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161 return (f->func_globals < g->func_globals) ? -1 : 1;
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162 c = f->func_argcount < g->func_argcount;
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163 if (c != 0)
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164 return c < 0 ? -1 : 1;
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165 c = cmpobject(f->func_argdefs, g->func_argdefs);
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166 if (c != 0)
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167 return c;
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168 return cmpobject(f->func_code, g->func_code);
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169 }
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170
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171 static long
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172 func_hash(f)
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173 funcobject *f;
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174 {
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175 long h;
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176 h = hashobject(f->func_code);
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177 if (h == -1) return h;
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178 h = h ^ (long)f->func_globals;
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179 if (h == -1) h = -2;
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180 return h;
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181 }
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182
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183 typeobject Functype = {
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184 OB_HEAD_INIT(&Typetype)
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185 0,
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186 "function",
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187 sizeof(funcobject),
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188 0,
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189 (destructor)func_dealloc, /*tp_dealloc*/
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190 0, /*tp_print*/
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191 (getattrfunc)func_getattr, /*tp_getattr*/
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192 0, /*tp_setattr*/
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193 (cmpfunc)func_compare, /*tp_compare*/
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194 (reprfunc)func_repr, /*tp_repr*/
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195 0, /*tp_as_number*/
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196 0, /*tp_as_sequence*/
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197 0, /*tp_as_mapping*/
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198 (hashfunc)func_hash, /*tp_hash*/
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199 };