Mercurial > kallithea
annotate rhodecode/lib/compat.py @ 1688:82e604d3fc46 beta
changeset ranges use new fileid method.
author | Marcin Kuzminski <marcin@python-works.com> |
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date | Tue, 15 Nov 2011 00:15:19 +0200 |
parents | d6cb805c92fd |
children | cf51bbfb120e |
rev | line source |
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1514
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1 # -*- coding: utf-8 -*- |
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2 """ |
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3 rhodecode.lib.compat |
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4 ~~~~~~~~~~~~~~~~~~~~ |
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5 |
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6 Python backward compatibility functions and common libs |
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7 |
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8 |
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9 :created_on: Oct 7, 2011 |
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10 :author: marcink |
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11 :copyright: (C) 2009-2010 Marcin Kuzminski <marcin@python-works.com> |
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12 :license: GPLv3, see COPYING for more details. |
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13 """ |
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14 # This program is free software: you can redistribute it and/or modify |
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15 # it under the terms of the GNU General Public License as published by |
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16 # the Free Software Foundation, either version 3 of the License, or |
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17 # (at your option) any later version. |
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18 # |
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19 # This program is distributed in the hope that it will be useful, |
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20 # but WITHOUT ANY WARRANTY; without even the implied warranty of |
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21 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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22 # GNU General Public License for more details. |
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23 # |
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24 # You should have received a copy of the GNU General Public License |
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25 # along with this program. If not, see <http://www.gnu.org/licenses/>. |
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26 |
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27 import os |
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28 from rhodecode import __platform__, PLATFORM_WIN |
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29 |
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30 #============================================================================== |
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31 # json |
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32 #============================================================================== |
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33 try: |
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34 import json |
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35 except ImportError: |
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36 import simplejson as json |
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37 |
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38 |
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39 #============================================================================== |
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40 # izip_longest |
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41 #============================================================================== |
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42 try: |
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43 from itertools import izip_longest |
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44 except ImportError: |
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45 import itertools |
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46 |
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47 def izip_longest(*args, **kwds): # noqa |
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48 fillvalue = kwds.get("fillvalue") |
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49 |
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50 def sentinel(counter=([fillvalue] * (len(args) - 1)).pop): |
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51 yield counter() # yields the fillvalue, or raises IndexError |
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52 |
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53 fillers = itertools.repeat(fillvalue) |
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54 iters = [itertools.chain(it, sentinel(), fillers) |
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55 for it in args] |
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56 try: |
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57 for tup in itertools.izip(*iters): |
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58 yield tup |
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59 except IndexError: |
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60 pass |
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61 |
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62 |
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63 #============================================================================== |
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64 # OrderedDict |
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65 #============================================================================== |
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66 |
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67 # Python Software Foundation License |
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68 |
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69 # XXX: it feels like using the class with "is" and "is not" instead of "==" and |
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70 # "!=" should be faster. |
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71 class _Nil(object): |
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72 |
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73 def __repr__(self): |
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74 return "nil" |
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75 |
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76 def __eq__(self, other): |
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77 if (isinstance(other, _Nil)): |
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78 return True |
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79 else: |
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80 return NotImplemented |
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81 |
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82 def __ne__(self, other): |
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83 if (isinstance(other, _Nil)): |
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84 return False |
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85 else: |
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86 return NotImplemented |
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87 |
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88 _nil = _Nil() |
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89 |
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90 class _odict(object): |
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91 """Ordered dict data structure, with O(1) complexity for dict operations |
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92 that modify one element. |
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93 |
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94 Overwriting values doesn't change their original sequential order. |
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95 """ |
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96 |
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97 def _dict_impl(self): |
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98 return None |
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99 |
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100 def __init__(self, data=(), **kwds): |
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101 """This doesn't accept keyword initialization as normal dicts to avoid |
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102 a trap - inside a function or method the keyword args are accessible |
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103 only as a dict, without a defined order, so their original order is |
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104 lost. |
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105 """ |
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106 if kwds: |
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107 raise TypeError("__init__() of ordered dict takes no keyword " |
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108 "arguments to avoid an ordering trap.") |
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109 self._dict_impl().__init__(self) |
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110 # If you give a normal dict, then the order of elements is undefined |
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111 if hasattr(data, "iteritems"): |
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112 for key, val in data.iteritems(): |
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113 self[key] = val |
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114 else: |
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115 for key, val in data: |
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116 self[key] = val |
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117 |
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118 # Double-linked list header |
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119 def _get_lh(self): |
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120 dict_impl = self._dict_impl() |
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121 if not hasattr(self, '_lh'): |
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122 dict_impl.__setattr__(self, '_lh', _nil) |
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123 return dict_impl.__getattribute__(self, '_lh') |
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124 |
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125 def _set_lh(self, val): |
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126 self._dict_impl().__setattr__(self, '_lh', val) |
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127 |
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128 lh = property(_get_lh, _set_lh) |
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129 |
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130 # Double-linked list tail |
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131 def _get_lt(self): |
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132 dict_impl = self._dict_impl() |
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133 if not hasattr(self, '_lt'): |
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134 dict_impl.__setattr__(self, '_lt', _nil) |
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135 return dict_impl.__getattribute__(self, '_lt') |
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136 |
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137 def _set_lt(self, val): |
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138 self._dict_impl().__setattr__(self, '_lt', val) |
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139 |
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140 lt = property(_get_lt, _set_lt) |
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141 |
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142 def __getitem__(self, key): |
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143 return self._dict_impl().__getitem__(self, key)[1] |
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144 |
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145 def __setitem__(self, key, val): |
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146 dict_impl = self._dict_impl() |
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147 try: |
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148 dict_impl.__getitem__(self, key)[1] = val |
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149 except KeyError, e: |
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150 new = [dict_impl.__getattribute__(self, 'lt'), val, _nil] |
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151 dict_impl.__setitem__(self, key, new) |
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152 if dict_impl.__getattribute__(self, 'lt') == _nil: |
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153 dict_impl.__setattr__(self, 'lh', key) |
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154 else: |
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155 dict_impl.__getitem__( |
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156 self, dict_impl.__getattribute__(self, 'lt'))[2] = key |
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157 dict_impl.__setattr__(self, 'lt', key) |
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158 |
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159 def __delitem__(self, key): |
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160 dict_impl = self._dict_impl() |
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161 pred, _ , succ = self._dict_impl().__getitem__(self, key) |
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162 if pred == _nil: |
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163 dict_impl.__setattr__(self, 'lh', succ) |
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164 else: |
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165 dict_impl.__getitem__(self, pred)[2] = succ |
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166 if succ == _nil: |
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167 dict_impl.__setattr__(self, 'lt', pred) |
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168 else: |
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169 dict_impl.__getitem__(self, succ)[0] = pred |
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170 dict_impl.__delitem__(self, key) |
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171 |
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172 def __contains__(self, key): |
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173 return key in self.keys() |
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174 |
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175 def __len__(self): |
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176 return len(self.keys()) |
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177 |
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178 def __str__(self): |
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179 pairs = ("%r: %r" % (k, v) for k, v in self.iteritems()) |
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180 return "{%s}" % ", ".join(pairs) |
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181 |
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182 def __repr__(self): |
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183 if self: |
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184 pairs = ("(%r, %r)" % (k, v) for k, v in self.iteritems()) |
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185 return "odict([%s])" % ", ".join(pairs) |
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186 else: |
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187 return "odict()" |
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188 |
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189 def get(self, k, x=None): |
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190 if k in self: |
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191 return self._dict_impl().__getitem__(self, k)[1] |
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192 else: |
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193 return x |
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194 |
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195 def __iter__(self): |
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196 dict_impl = self._dict_impl() |
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197 curr_key = dict_impl.__getattribute__(self, 'lh') |
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198 while curr_key != _nil: |
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199 yield curr_key |
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200 curr_key = dict_impl.__getitem__(self, curr_key)[2] |
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201 |
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202 iterkeys = __iter__ |
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203 |
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204 def keys(self): |
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205 return list(self.iterkeys()) |
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206 |
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207 def itervalues(self): |
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208 dict_impl = self._dict_impl() |
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209 curr_key = dict_impl.__getattribute__(self, 'lh') |
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210 while curr_key != _nil: |
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211 _, val, curr_key = dict_impl.__getitem__(self, curr_key) |
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212 yield val |
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213 |
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214 def values(self): |
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215 return list(self.itervalues()) |
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216 |
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217 def iteritems(self): |
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218 dict_impl = self._dict_impl() |
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219 curr_key = dict_impl.__getattribute__(self, 'lh') |
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220 while curr_key != _nil: |
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221 _, val, next_key = dict_impl.__getitem__(self, curr_key) |
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222 yield curr_key, val |
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223 curr_key = next_key |
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224 |
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225 def items(self): |
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226 return list(self.iteritems()) |
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227 |
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228 def sort(self, cmp=None, key=None, reverse=False): |
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229 items = [(k, v) for k, v in self.items()] |
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230 if cmp is not None: |
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231 items = sorted(items, cmp=cmp) |
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232 elif key is not None: |
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233 items = sorted(items, key=key) |
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234 else: |
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235 items = sorted(items, key=lambda x: x[1]) |
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236 if reverse: |
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237 items.reverse() |
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238 self.clear() |
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239 self.__init__(items) |
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240 |
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241 def clear(self): |
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242 dict_impl = self._dict_impl() |
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243 dict_impl.clear(self) |
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244 dict_impl.__setattr__(self, 'lh', _nil) |
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245 dict_impl.__setattr__(self, 'lt', _nil) |
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246 |
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247 def copy(self): |
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248 return self.__class__(self) |
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249 |
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250 def update(self, data=(), **kwds): |
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251 if kwds: |
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252 raise TypeError("update() of ordered dict takes no keyword " |
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253 "arguments to avoid an ordering trap.") |
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254 if hasattr(data, "iteritems"): |
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255 data = data.iteritems() |
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256 for key, val in data: |
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257 self[key] = val |
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258 |
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259 def setdefault(self, k, x=None): |
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260 try: |
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261 return self[k] |
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262 except KeyError: |
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263 self[k] = x |
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|
264 return x |
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|
265 |
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266 def pop(self, k, x=_nil): |
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267 try: |
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268 val = self[k] |
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269 del self[k] |
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270 return val |
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271 except KeyError: |
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272 if x == _nil: |
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273 raise |
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274 return x |
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275 |
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276 def popitem(self): |
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277 try: |
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278 dict_impl = self._dict_impl() |
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279 key = dict_impl.__getattribute__(self, 'lt') |
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280 return key, self.pop(key) |
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281 except KeyError: |
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282 raise KeyError("'popitem(): ordered dictionary is empty'") |
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283 |
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284 def riterkeys(self): |
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285 """To iterate on keys in reversed order. |
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286 """ |
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287 dict_impl = self._dict_impl() |
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288 curr_key = dict_impl.__getattribute__(self, 'lt') |
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289 while curr_key != _nil: |
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290 yield curr_key |
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291 curr_key = dict_impl.__getitem__(self, curr_key)[0] |
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292 |
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293 __reversed__ = riterkeys |
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294 |
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295 def rkeys(self): |
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296 """List of the keys in reversed order. |
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297 """ |
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298 return list(self.riterkeys()) |
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299 |
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300 def ritervalues(self): |
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301 """To iterate on values in reversed order. |
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302 """ |
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303 dict_impl = self._dict_impl() |
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304 curr_key = dict_impl.__getattribute__(self, 'lt') |
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305 while curr_key != _nil: |
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306 curr_key, val, _ = dict_impl.__getitem__(self, curr_key) |
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307 yield val |
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308 |
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309 def rvalues(self): |
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310 """List of the values in reversed order. |
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311 """ |
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312 return list(self.ritervalues()) |
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313 |
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314 def riteritems(self): |
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315 """To iterate on (key, value) in reversed order. |
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316 """ |
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317 dict_impl = self._dict_impl() |
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318 curr_key = dict_impl.__getattribute__(self, 'lt') |
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319 while curr_key != _nil: |
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320 pred_key, val, _ = dict_impl.__getitem__(self, curr_key) |
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321 yield curr_key, val |
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322 curr_key = pred_key |
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323 |
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324 def ritems(self): |
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325 """List of the (key, value) in reversed order. |
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326 """ |
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327 return list(self.riteritems()) |
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328 |
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329 def firstkey(self): |
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330 if self: |
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331 return self._dict_impl().__getattribute__(self, 'lh') |
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332 else: |
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333 raise KeyError("'firstkey(): ordered dictionary is empty'") |
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334 |
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335 def lastkey(self): |
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336 if self: |
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337 return self._dict_impl().__getattribute__(self, 'lt') |
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338 else: |
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339 raise KeyError("'lastkey(): ordered dictionary is empty'") |
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340 |
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341 def as_dict(self): |
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342 return self._dict_impl()(self.items()) |
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343 |
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344 def _repr(self): |
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345 """_repr(): low level repr of the whole data contained in the odict. |
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346 Useful for debugging. |
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347 """ |
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348 dict_impl = self._dict_impl() |
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349 form = "odict low level repr lh,lt,data: %r, %r, %s" |
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350 return form % (dict_impl.__getattribute__(self, 'lh'), |
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351 dict_impl.__getattribute__(self, 'lt'), |
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352 dict_impl.__repr__(self)) |
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353 |
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354 class OrderedDict(_odict, dict): |
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355 |
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356 def _dict_impl(self): |
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357 return dict |
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358 |
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359 |
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360 #============================================================================== |
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361 # OrderedSet |
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362 #============================================================================== |
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363 from sqlalchemy.util import OrderedSet |
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364 |
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365 |
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366 #============================================================================== |
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367 # kill FUNCTIONS |
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368 #============================================================================== |
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369 if __platform__ in PLATFORM_WIN: |
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370 import ctypes |
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371 |
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372 def kill(pid, sig): |
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373 """kill function for Win32""" |
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374 kernel32 = ctypes.windll.kernel32 |
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375 handle = kernel32.OpenProcess(1, 0, pid) |
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376 return (0 != kernel32.TerminateProcess(handle, 0)) |
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377 |
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378 else: |
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379 kill = os.kill |