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annotate Modules/grpmodule.c @ 79675:c0a2294de787 2.7

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Issue #16199: Backport 2to3 typo fix from 3.2.
author Chris Jerdonek <chris.jerdonek@gmail.com>
date Thu, 11 Oct 2012 16:15:46 -0700
parents 79a2b6a12805
children 7cb403f8a865
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1
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2 /* UNIX group file access module */
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3
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4 #include "Python.h"
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5 #include "structseq.h"
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6
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7 #include <sys/types.h>
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8 #include <grp.h>
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9
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10 static PyStructSequence_Field struct_group_type_fields[] = {
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11 {"gr_name", "group name"},
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12 {"gr_passwd", "password"},
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13 {"gr_gid", "group id"},
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14 {"gr_mem", "group memebers"},
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15 {0}
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16 };
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17
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18 PyDoc_STRVAR(struct_group__doc__,
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19 "grp.struct_group: Results from getgr*() routines.\n\n\
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20 This object may be accessed either as a tuple of\n\
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21 (gr_name,gr_passwd,gr_gid,gr_mem)\n\
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22 or via the object attributes as named in the above tuple.\n");
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23
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24 static PyStructSequence_Desc struct_group_type_desc = {
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25 "grp.struct_group",
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26 struct_group__doc__,
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27 struct_group_type_fields,
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28 4,
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29 };
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30
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31
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32 static int initialized;
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33 static PyTypeObject StructGrpType;
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34
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35 static PyObject *
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36 mkgrent(struct group *p)
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37 {
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38 int setIndex = 0;
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39 PyObject *v = PyStructSequence_New(&StructGrpType), *w;
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40 char **member;
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41
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42 if (v == NULL)
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43 return NULL;
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44
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45 if ((w = PyList_New(0)) == NULL) {
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46 Py_DECREF(v);
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47 return NULL;
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48 }
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49 for (member = p->gr_mem; *member != NULL; member++) {
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50 PyObject *x = PyString_FromString(*member);
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51 if (x == NULL || PyList_Append(w, x) != 0) {
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52 Py_XDECREF(x);
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53 Py_DECREF(w);
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54 Py_DECREF(v);
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55 return NULL;
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56 }
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57 Py_DECREF(x);
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58 }
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59
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60 #define SET(i,val) PyStructSequence_SET_ITEM(v, i, val)
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61 SET(setIndex++, PyString_FromString(p->gr_name));
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62 #ifdef __VMS
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63 SET(setIndex++, Py_None);
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64 Py_INCREF(Py_None);
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65 #else
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66 if (p->gr_passwd)
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67 SET(setIndex++, PyString_FromString(p->gr_passwd));
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68 else {
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69 SET(setIndex++, Py_None);
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70 Py_INCREF(Py_None);
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71 }
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72 #endif
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73 SET(setIndex++, PyInt_FromLong((long) p->gr_gid));
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74 SET(setIndex++, w);
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75 #undef SET
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76
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77 if (PyErr_Occurred()) {
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78 Py_DECREF(v);
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79 return NULL;
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80 }
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81
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82 return v;
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83 }
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84
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85 static PyObject *
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86 grp_getgrgid(PyObject *self, PyObject *pyo_id)
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87 {
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88 PyObject *py_int_id;
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89 unsigned int gid;
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90 struct group *p;
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91
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92 py_int_id = PyNumber_Int(pyo_id);
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93 if (!py_int_id)
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94 return NULL;
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95 gid = PyInt_AS_LONG(py_int_id);
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96 Py_DECREF(py_int_id);
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97
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98 if ((p = getgrgid(gid)) == NULL) {
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99 PyErr_Format(PyExc_KeyError, "getgrgid(): gid not found: %d", gid);
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100 return NULL;
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101 }
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102 return mkgrent(p);
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103 }
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104
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105 static PyObject *
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106 grp_getgrnam(PyObject *self, PyObject *pyo_name)
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107 {
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108 PyObject *py_str_name;
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109 char *name;
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110 struct group *p;
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111
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112 py_str_name = PyObject_Str(pyo_name);
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113 if (!py_str_name)
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114 return NULL;
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115 name = PyString_AS_STRING(py_str_name);
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116
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117 if ((p = getgrnam(name)) == NULL) {
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118 PyErr_Format(PyExc_KeyError, "getgrnam(): name not found: %s", name);
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119 Py_DECREF(py_str_name);
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120 return NULL;
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121 }
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122
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123 Py_DECREF(py_str_name);
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124 return mkgrent(p);
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125 }
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126
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127 static PyObject *
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128 grp_getgrall(PyObject *self, PyObject *ignore)
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129 {
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130 PyObject *d;
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131 struct group *p;
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132
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133 if ((d = PyList_New(0)) == NULL)
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134 return NULL;
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135 setgrent();
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136 while ((p = getgrent()) != NULL) {
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137 PyObject *v = mkgrent(p);
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138 if (v == NULL || PyList_Append(d, v) != 0) {
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139 Py_XDECREF(v);
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140 Py_DECREF(d);
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141 endgrent();
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142 return NULL;
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143 }
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144 Py_DECREF(v);
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145 }
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146 endgrent();
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147 return d;
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148 }
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149
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150 static PyMethodDef grp_methods[] = {
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151 {"getgrgid", grp_getgrgid, METH_O,
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152 "getgrgid(id) -> tuple\n\
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153 Return the group database entry for the given numeric group ID. If\n\
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154 id is not valid, raise KeyError."},
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155 {"getgrnam", grp_getgrnam, METH_O,
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156 "getgrnam(name) -> tuple\n\
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157 Return the group database entry for the given group name. If\n\
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158 name is not valid, raise KeyError."},
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159 {"getgrall", grp_getgrall, METH_NOARGS,
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160 "getgrall() -> list of tuples\n\
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161 Return a list of all available group entries, in arbitrary order.\n\
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162 An entry whose name starts with '+' or '-' represents an instruction\n\
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163 to use YP/NIS and may not be accessible via getgrnam or getgrgid."},
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164 {NULL, NULL} /* sentinel */
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165 };
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166
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167 PyDoc_STRVAR(grp__doc__,
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168 "Access to the Unix group database.\n\
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169 \n\
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170 Group entries are reported as 4-tuples containing the following fields\n\
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171 from the group database, in order:\n\
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172 \n\
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173 name - name of the group\n\
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174 passwd - group password (encrypted); often empty\n\
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175 gid - numeric ID of the group\n\
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176 mem - list of members\n\
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177 \n\
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178 The gid is an integer, name and password are strings. (Note that most\n\
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179 users are not explicitly listed as members of the groups they are in\n\
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180 according to the password database. Check both databases to get\n\
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181 complete membership information.)");
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182
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183
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184 PyMODINIT_FUNC
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185 initgrp(void)
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186 {
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187 PyObject *m, *d;
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188 m = Py_InitModule3("grp", grp_methods, grp__doc__);
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189 if (m == NULL)
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190 return;
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191 d = PyModule_GetDict(m);
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192 if (!initialized)
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193 PyStructSequence_InitType(&StructGrpType, &struct_group_type_desc);
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194 PyDict_SetItemString(d, "struct_group", (PyObject *) &StructGrpType);
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195 initialized = 1;
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196 }