Mercurial > kallithea
annotate rhodecode/lib/compat.py @ 4099:43b54436d459
update issue tracker and official site
author | Marcin Kuzminski <marcin@python-works.com> |
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date | Sun, 01 Sep 2013 19:56:08 +0200 |
parents | 2b9da8749065 |
children | ffd45b185016 |
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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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2012 copyrights
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11 :copyright: (C) 2010-2010 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 __py_version__, is_windows |
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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 from rhodecode.lib.ext_json import json |
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34 |
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35 if __py_version__ >= (2, 7): |
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36 import unittest |
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37 else: |
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38 import unittest2 as unittest |
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39 |
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40 #============================================================================== |
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41 # izip_longest |
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42 #============================================================================== |
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43 try: |
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44 from itertools import izip_longest |
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45 except ImportError: |
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46 import itertools |
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47 |
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48 def izip_longest(*args, **kwds): |
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49 fillvalue = kwds.get("fillvalue") |
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50 |
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51 def sentinel(counter=([fillvalue] * (len(args) - 1)).pop): |
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52 yield counter() # yields the fillvalue, or raises IndexError |
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53 |
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54 fillers = itertools.repeat(fillvalue) |
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55 iters = [itertools.chain(it, sentinel(), fillers) |
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56 for it in args] |
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57 try: |
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58 for tup in itertools.izip(*iters): |
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59 yield tup |
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60 except IndexError: |
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61 pass |
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62 |
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63 |
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64 #============================================================================== |
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65 # OrderedDict |
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66 #============================================================================== |
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67 |
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68 # Python Software Foundation License |
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69 |
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70 # XXX: it feels like using the class with "is" and "is not" instead of "==" and |
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71 # "!=" should be faster. |
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72 class _Nil(object): |
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73 |
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74 def __repr__(self): |
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75 return "nil" |
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76 |
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77 def __eq__(self, other): |
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78 if (isinstance(other, _Nil)): |
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79 return True |
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80 else: |
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81 return NotImplemented |
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82 |
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83 def __ne__(self, other): |
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84 if (isinstance(other, _Nil)): |
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85 return False |
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86 else: |
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87 return NotImplemented |
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88 |
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89 _nil = _Nil() |
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90 |
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91 |
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92 class _odict(object): |
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93 """Ordered dict data structure, with O(1) complexity for dict operations |
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94 that modify one element. |
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95 |
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96 Overwriting values doesn't change their original sequential order. |
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97 """ |
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98 |
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99 def _dict_impl(self): |
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100 return None |
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101 |
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102 def __init__(self, data=(), **kwds): |
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103 """This doesn't accept keyword initialization as normal dicts to avoid |
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104 a trap - inside a function or method the keyword args are accessible |
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105 only as a dict, without a defined order, so their original order is |
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106 lost. |
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107 """ |
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108 if kwds: |
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109 raise TypeError("__init__() of ordered dict takes no keyword " |
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110 "arguments to avoid an ordering trap.") |
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111 self._dict_impl().__init__(self) |
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112 # If you give a normal dict, then the order of elements is undefined |
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113 if hasattr(data, "iteritems"): |
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114 for key, val in data.iteritems(): |
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115 self[key] = val |
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116 else: |
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117 for key, val in data: |
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118 self[key] = val |
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119 |
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120 # Double-linked list header |
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121 def _get_lh(self): |
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122 dict_impl = self._dict_impl() |
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123 if not hasattr(self, '_lh'): |
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124 dict_impl.__setattr__(self, '_lh', _nil) |
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125 return dict_impl.__getattribute__(self, '_lh') |
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126 |
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127 def _set_lh(self, val): |
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128 self._dict_impl().__setattr__(self, '_lh', val) |
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129 |
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130 lh = property(_get_lh, _set_lh) |
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131 |
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132 # Double-linked list tail |
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133 def _get_lt(self): |
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134 dict_impl = self._dict_impl() |
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135 if not hasattr(self, '_lt'): |
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136 dict_impl.__setattr__(self, '_lt', _nil) |
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137 return dict_impl.__getattribute__(self, '_lt') |
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138 |
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139 def _set_lt(self, val): |
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140 self._dict_impl().__setattr__(self, '_lt', val) |
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141 |
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142 lt = property(_get_lt, _set_lt) |
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143 |
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144 def __getitem__(self, key): |
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145 return self._dict_impl().__getitem__(self, key)[1] |
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146 |
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147 def __setitem__(self, key, val): |
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148 dict_impl = self._dict_impl() |
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149 try: |
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150 dict_impl.__getitem__(self, key)[1] = val |
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151 except KeyError: |
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152 new = [dict_impl.__getattribute__(self, 'lt'), val, _nil] |
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153 dict_impl.__setitem__(self, key, new) |
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154 if dict_impl.__getattribute__(self, 'lt') == _nil: |
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155 dict_impl.__setattr__(self, 'lh', key) |
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156 else: |
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157 dict_impl.__getitem__( |
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158 self, dict_impl.__getattribute__(self, 'lt'))[2] = key |
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159 dict_impl.__setattr__(self, 'lt', key) |
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160 |
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161 def __delitem__(self, key): |
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162 dict_impl = self._dict_impl() |
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163 pred, _, succ = self._dict_impl().__getitem__(self, key) |
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164 if pred == _nil: |
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165 dict_impl.__setattr__(self, 'lh', succ) |
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166 else: |
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167 dict_impl.__getitem__(self, pred)[2] = succ |
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168 if succ == _nil: |
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169 dict_impl.__setattr__(self, 'lt', pred) |
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170 else: |
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171 dict_impl.__getitem__(self, succ)[0] = pred |
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172 dict_impl.__delitem__(self, key) |
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173 |
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174 def __contains__(self, key): |
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175 return key in self.keys() |
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176 |
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177 def __len__(self): |
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178 return len(self.keys()) |
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179 |
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180 def __str__(self): |
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181 pairs = ("%r: %r" % (k, v) for k, v in self.iteritems()) |
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182 return "{%s}" % ", ".join(pairs) |
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183 |
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184 def __repr__(self): |
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185 if self: |
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186 pairs = ("(%r, %r)" % (k, v) for k, v in self.iteritems()) |
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187 return "odict([%s])" % ", ".join(pairs) |
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188 else: |
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189 return "odict()" |
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190 |
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191 def get(self, k, x=None): |
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192 if k in self: |
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193 return self._dict_impl().__getitem__(self, k)[1] |
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194 else: |
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195 return x |
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196 |
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197 def __iter__(self): |
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198 dict_impl = self._dict_impl() |
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199 curr_key = dict_impl.__getattribute__(self, 'lh') |
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200 while curr_key != _nil: |
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201 yield curr_key |
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202 curr_key = dict_impl.__getitem__(self, curr_key)[2] |
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203 |
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204 iterkeys = __iter__ |
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205 |
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206 def keys(self): |
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207 return list(self.iterkeys()) |
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208 |
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209 def itervalues(self): |
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210 dict_impl = self._dict_impl() |
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211 curr_key = dict_impl.__getattribute__(self, 'lh') |
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212 while curr_key != _nil: |
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213 _, val, curr_key = dict_impl.__getitem__(self, curr_key) |
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214 yield val |
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215 |
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216 def values(self): |
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217 return list(self.itervalues()) |
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218 |
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219 def iteritems(self): |
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220 dict_impl = self._dict_impl() |
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221 curr_key = dict_impl.__getattribute__(self, 'lh') |
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222 while curr_key != _nil: |
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223 _, val, next_key = dict_impl.__getitem__(self, curr_key) |
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224 yield curr_key, val |
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225 curr_key = next_key |
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226 |
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227 def items(self): |
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228 return list(self.iteritems()) |
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229 |
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230 def sort(self, cmp=None, key=None, reverse=False): |
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231 items = [(k, v) for k, v in self.items()] |
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232 if cmp is not None: |
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233 items = sorted(items, cmp=cmp) |
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|
234 elif key is not None: |
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|
235 items = sorted(items, key=key) |
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|
236 else: |
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237 items = sorted(items, key=lambda x: x[1]) |
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|
238 if reverse: |
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|
239 items.reverse() |
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240 self.clear() |
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|
241 self.__init__(items) |
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242 |
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243 def clear(self): |
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244 dict_impl = self._dict_impl() |
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245 dict_impl.clear(self) |
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246 dict_impl.__setattr__(self, 'lh', _nil) |
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247 dict_impl.__setattr__(self, 'lt', _nil) |
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248 |
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249 def copy(self): |
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250 return self.__class__(self) |
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251 |
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252 def update(self, data=(), **kwds): |
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253 if kwds: |
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|
254 raise TypeError("update() of ordered dict takes no keyword " |
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|
255 "arguments to avoid an ordering trap.") |
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|
256 if hasattr(data, "iteritems"): |
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|
257 data = data.iteritems() |
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|
258 for key, val in data: |
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259 self[key] = val |
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|
260 |
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|
261 def setdefault(self, k, x=None): |
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|
262 try: |
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|
263 return self[k] |
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|
264 except KeyError: |
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|
265 self[k] = x |
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|
266 return x |
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267 |
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268 def pop(self, k, x=_nil): |
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269 try: |
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270 val = self[k] |
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271 del self[k] |
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272 return val |
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273 except KeyError: |
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274 if x == _nil: |
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275 raise |
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276 return x |
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277 |
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278 def popitem(self): |
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279 try: |
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280 dict_impl = self._dict_impl() |
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281 key = dict_impl.__getattribute__(self, 'lt') |
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282 return key, self.pop(key) |
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283 except KeyError: |
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284 raise KeyError("'popitem(): ordered dictionary is empty'") |
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285 |
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286 def riterkeys(self): |
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287 """To iterate on keys in reversed order. |
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288 """ |
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289 dict_impl = self._dict_impl() |
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290 curr_key = dict_impl.__getattribute__(self, 'lt') |
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291 while curr_key != _nil: |
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292 yield curr_key |
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293 curr_key = dict_impl.__getitem__(self, curr_key)[0] |
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294 |
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295 __reversed__ = riterkeys |
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296 |
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297 def rkeys(self): |
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298 """List of the keys in reversed order. |
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299 """ |
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300 return list(self.riterkeys()) |
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301 |
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302 def ritervalues(self): |
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303 """To iterate on values in reversed order. |
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304 """ |
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305 dict_impl = self._dict_impl() |
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306 curr_key = dict_impl.__getattribute__(self, 'lt') |
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307 while curr_key != _nil: |
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308 curr_key, val, _ = dict_impl.__getitem__(self, curr_key) |
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309 yield val |
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310 |
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311 def rvalues(self): |
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312 """List of the values in reversed order. |
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313 """ |
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314 return list(self.ritervalues()) |
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315 |
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316 def riteritems(self): |
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317 """To iterate on (key, value) in reversed order. |
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318 """ |
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319 dict_impl = self._dict_impl() |
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320 curr_key = dict_impl.__getattribute__(self, 'lt') |
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321 while curr_key != _nil: |
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322 pred_key, val, _ = dict_impl.__getitem__(self, curr_key) |
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323 yield curr_key, val |
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324 curr_key = pred_key |
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325 |
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326 def ritems(self): |
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327 """List of the (key, value) in reversed order. |
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328 """ |
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329 return list(self.riteritems()) |
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330 |
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331 def firstkey(self): |
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332 if self: |
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333 return self._dict_impl().__getattribute__(self, 'lh') |
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334 else: |
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335 raise KeyError("'firstkey(): ordered dictionary is empty'") |
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336 |
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337 def lastkey(self): |
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338 if self: |
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339 return self._dict_impl().__getattribute__(self, 'lt') |
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340 else: |
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341 raise KeyError("'lastkey(): ordered dictionary is empty'") |
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342 |
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343 def as_dict(self): |
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344 return self._dict_impl()(self.items()) |
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345 |
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346 def _repr(self): |
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347 """_repr(): low level repr of the whole data contained in the odict. |
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348 Useful for debugging. |
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349 """ |
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350 dict_impl = self._dict_impl() |
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351 form = "odict low level repr lh,lt,data: %r, %r, %s" |
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352 return form % (dict_impl.__getattribute__(self, 'lh'), |
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353 dict_impl.__getattribute__(self, 'lt'), |
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354 dict_impl.__repr__(self)) |
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355 |
1890
a3efaaa6ed4f
fixes issue #271
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356 |
1514
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357 class OrderedDict(_odict, dict): |
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358 |
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359 def _dict_impl(self): |
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360 return dict |
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361 |
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362 |
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parents:
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changeset
|
363 #============================================================================== |
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364 # OrderedSet |
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365 #============================================================================== |
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366 from sqlalchemy.util import OrderedSet |
1549
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diff
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367 |
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368 |
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369 #============================================================================== |
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370 # kill FUNCTIONS |
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371 #============================================================================== |
3797
d7488551578e
synced vcs with upstream
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372 if is_windows: |
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373 import ctypes |
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374 |
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375 def kill(pid, sig): |
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376 """kill function for Win32""" |
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377 kernel32 = ctypes.windll.kernel32 |
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378 handle = kernel32.OpenProcess(1, 0, pid) |
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379 return (0 != kernel32.TerminateProcess(handle, 0)) |
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380 |
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381 else: |
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382 kill = os.kill |
2068 | 383 |
384 | |
385 #============================================================================== | |
386 # itertools.product | |
387 #============================================================================== | |
388 | |
389 try: | |
390 from itertools import product | |
391 except ImportError: | |
392 def product(*args, **kwds): | |
393 # product('ABCD', 'xy') --> Ax Ay Bx By Cx Cy Dx Dy | |
394 # product(range(2), repeat=3) --> 000 001 010 011 100 101 110 111 | |
395 pools = map(tuple, args) * kwds.get('repeat', 1) | |
396 result = [[]] | |
397 for pool in pools: | |
398 result = [x + [y] for x in result for y in pool] | |
399 for prod in result: | |
400 yield tuple(prod) | |
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Moved BytesIO into compat because of py25 compatibility issue
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changeset
|
401 |
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Moved BytesIO into compat because of py25 compatibility issue
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diff
changeset
|
402 |
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Moved BytesIO into compat because of py25 compatibility issue
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changeset
|
403 #============================================================================== |
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Moved BytesIO into compat because of py25 compatibility issue
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|
404 # BytesIO |
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Moved BytesIO into compat because of py25 compatibility issue
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405 #============================================================================== |
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Moved BytesIO into compat because of py25 compatibility issue
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diff
changeset
|
406 |
e8650fbc4d4e
Moved BytesIO into compat because of py25 compatibility issue
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parents:
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diff
changeset
|
407 try: |
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Moved BytesIO into compat because of py25 compatibility issue
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changeset
|
408 from io import BytesIO |
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Moved BytesIO into compat because of py25 compatibility issue
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diff
changeset
|
409 except ImportError: |
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Moved BytesIO into compat because of py25 compatibility issue
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parents:
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diff
changeset
|
410 from cStringIO import StringIO as BytesIO |
2729
e9e7c40b4f1a
added deque with maxlen for py2.5 compat
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parents:
2552
diff
changeset
|
411 |
e9e7c40b4f1a
added deque with maxlen for py2.5 compat
Marcin Kuzminski <marcin@python-works.com>
parents:
2552
diff
changeset
|
412 |
e9e7c40b4f1a
added deque with maxlen for py2.5 compat
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parents:
2552
diff
changeset
|
413 #============================================================================== |
2790
3c0ae44557c4
more py2.5 compatibility patches
Marcin Kuzminski <marcin@python-works.com>
parents:
2730
diff
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414 # bytes |
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415 #============================================================================== |
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416 if __py_version__ >= (2, 6): |
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417 _bytes = bytes |
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418 else: |
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419 # in py2.6 bytes is a synonim for str |
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420 _bytes = str |
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421 |
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422 if __py_version__ >= (2, 6): |
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423 _bytearray = bytearray |
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424 else: |
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425 import array |
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426 # no idea if this is correct but all integration tests are passing |
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427 # i think we never use bytearray anyway |
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428 _bytearray = array |
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429 |
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430 |
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431 #============================================================================== |
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432 # deque |
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433 #============================================================================== |
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434 |
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435 if __py_version__ >= (2, 6): |
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436 from collections import deque |
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437 else: |
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438 #need to implement our own deque with maxlen |
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439 class deque(object): |
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440 |
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441 def __init__(self, iterable=(), maxlen= -1): |
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442 if not hasattr(self, 'data'): |
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443 self.left = self.right = 0 |
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444 self.data = {} |
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445 self.maxlen = maxlen or -1 |
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446 self.extend(iterable) |
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447 |
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448 def append(self, x): |
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449 self.data[self.right] = x |
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450 self.right += 1 |
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451 if self.maxlen != -1 and len(self) > self.maxlen: |
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452 self.popleft() |
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453 |
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454 def appendleft(self, x): |
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455 self.left -= 1 |
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456 self.data[self.left] = x |
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457 if self.maxlen != -1 and len(self) > self.maxlen: |
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458 self.pop() |
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459 |
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460 def pop(self): |
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461 if self.left == self.right: |
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462 raise IndexError('cannot pop from empty deque') |
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463 self.right -= 1 |
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464 elem = self.data[self.right] |
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465 del self.data[self.right] |
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466 return elem |
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467 |
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468 def popleft(self): |
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469 if self.left == self.right: |
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470 raise IndexError('cannot pop from empty deque') |
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471 elem = self.data[self.left] |
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472 del self.data[self.left] |
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473 self.left += 1 |
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474 return elem |
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|
475 |
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476 def clear(self): |
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477 self.data.clear() |
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478 self.left = self.right = 0 |
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|
479 |
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480 def extend(self, iterable): |
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481 for elem in iterable: |
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482 self.append(elem) |
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|
483 |
e9e7c40b4f1a
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|
484 def extendleft(self, iterable): |
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|
485 for elem in iterable: |
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|
486 self.appendleft(elem) |
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|
487 |
e9e7c40b4f1a
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|
488 def rotate(self, n=1): |
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489 if self: |
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|
490 n %= len(self) |
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|
491 for i in xrange(n): |
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|
492 self.appendleft(self.pop()) |
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|
493 |
e9e7c40b4f1a
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|
494 def __getitem__(self, i): |
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|
495 if i < 0: |
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496 i += len(self) |
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497 try: |
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|
498 return self.data[i + self.left] |
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499 except KeyError: |
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500 raise IndexError |
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501 |
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|
502 def __setitem__(self, i, value): |
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|
503 if i < 0: |
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504 i += len(self) |
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505 try: |
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|
506 self.data[i + self.left] = value |
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|
507 except KeyError: |
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508 raise IndexError |
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|
509 |
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|
510 def __delitem__(self, i): |
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|
511 size = len(self) |
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|
512 if not (-size <= i < size): |
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513 raise IndexError |
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514 data = self.data |
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|
515 if i < 0: |
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516 i += size |
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517 for j in xrange(self.left + i, self.right - 1): |
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518 data[j] = data[j + 1] |
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519 self.pop() |
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520 |
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521 def __len__(self): |
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522 return self.right - self.left |
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523 |
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|
524 def __cmp__(self, other): |
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|
525 if type(self) != type(other): |
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526 return cmp(type(self), type(other)) |
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527 return cmp(list(self), list(other)) |
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528 |
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529 def __repr__(self, _track=[]): |
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530 if id(self) in _track: |
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531 return '...' |
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532 _track.append(id(self)) |
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533 r = 'deque(%r, maxlen=%s)' % (list(self), self.maxlen) |
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534 _track.remove(id(self)) |
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535 return r |
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536 |
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537 def __getstate__(self): |
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538 return (tuple(self),) |
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539 |
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540 def __setstate__(self, s): |
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541 self.__init__(s[0]) |
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542 |
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543 def __hash__(self): |
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544 raise TypeError |
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545 |
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546 def __copy__(self): |
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547 return self.__class__(self) |
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548 |
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549 def __deepcopy__(self, memo={}): |
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550 from copy import deepcopy |
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551 result = self.__class__() |
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552 memo[id(self)] = result |
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553 result.__init__(deepcopy(tuple(self), memo)) |
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554 return result |