Mercurial > kallithea
annotate rhodecode/lib/odict.py @ 1340:cbdd583f1e58 beta
reverted copy of cached instance:
CPython
changelog
total_time 39.7253162861
average on req 0.993132907152
changesets
total_time 42.5156304836
average on req 0.425156304836
Total: 546 MB
changelog
total_time 35.5851216316
average on req 0.889628040791
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total_time 30.3608012199
average on req 0.303608012199
Total: 475 MB
author | Marcin Kuzminski <marcin@python-works.com> |
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date | Sun, 15 May 2011 18:29:33 +0200 |
parents | 37625d304a16 |
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rev | line source |
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1337
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Changed OrderedDict implementation to pypy odict, in general it's the fastest and most reliable solution. Added OrderedTuple from python foundation.
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parents:
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1 # Python Software Foundation License |
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2 |
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3 # XXX: it feels like using the class with "is" and "is not" instead of "==" and |
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4 # "!=" should be faster. |
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5 class _Nil(object): |
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6 |
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7 def __repr__(self): |
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8 return "nil" |
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9 |
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10 def __eq__(self, other): |
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11 if (isinstance(other, _Nil)): |
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12 return True |
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13 else: |
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14 return NotImplemented |
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15 |
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16 def __ne__(self, other): |
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17 if (isinstance(other, _Nil)): |
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18 return False |
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19 else: |
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20 return NotImplemented |
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21 |
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22 _nil = _Nil() |
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23 |
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24 class _odict(object): |
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25 """Ordered dict data structure, with O(1) complexity for dict operations |
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26 that modify one element. |
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27 |
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28 Overwriting values doesn't change their original sequential order. |
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29 """ |
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30 |
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31 def _dict_impl(self): |
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32 return None |
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33 |
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34 def __init__(self, data=(), **kwds): |
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35 """This doesn't accept keyword initialization as normal dicts to avoid |
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36 a trap - inside a function or method the keyword args are accessible |
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37 only as a dict, without a defined order, so their original order is |
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38 lost. |
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39 """ |
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40 if kwds: |
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41 raise TypeError("__init__() of ordered dict takes no keyword " |
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42 "arguments to avoid an ordering trap.") |
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43 self._dict_impl().__init__(self) |
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44 # If you give a normal dict, then the order of elements is undefined |
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45 if hasattr(data, "iteritems"): |
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46 for key, val in data.iteritems(): |
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47 self[key] = val |
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48 else: |
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49 for key, val in data: |
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50 self[key] = val |
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51 |
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52 # Double-linked list header |
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53 def _get_lh(self): |
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54 dict_impl = self._dict_impl() |
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55 if not hasattr(self, '_lh'): |
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56 dict_impl.__setattr__(self, '_lh', _nil) |
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57 return dict_impl.__getattribute__(self, '_lh') |
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58 |
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59 def _set_lh(self, val): |
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60 self._dict_impl().__setattr__(self, '_lh', val) |
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61 |
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62 lh = property(_get_lh, _set_lh) |
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63 |
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64 # Double-linked list tail |
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65 def _get_lt(self): |
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66 dict_impl = self._dict_impl() |
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67 if not hasattr(self, '_lt'): |
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68 dict_impl.__setattr__(self, '_lt', _nil) |
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69 return dict_impl.__getattribute__(self, '_lt') |
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70 |
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71 def _set_lt(self, val): |
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72 self._dict_impl().__setattr__(self, '_lt', val) |
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73 |
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74 lt = property(_get_lt, _set_lt) |
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75 |
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76 def __getitem__(self, key): |
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77 return self._dict_impl().__getitem__(self, key)[1] |
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78 |
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79 def __setitem__(self, key, val): |
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80 dict_impl = self._dict_impl() |
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81 try: |
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82 dict_impl.__getitem__(self, key)[1] = val |
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83 except KeyError, e: |
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84 new = [dict_impl.__getattribute__(self, 'lt'), val, _nil] |
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85 dict_impl.__setitem__(self, key, new) |
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86 if dict_impl.__getattribute__(self, 'lt') == _nil: |
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87 dict_impl.__setattr__(self, 'lh', key) |
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88 else: |
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89 dict_impl.__getitem__( |
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90 self, dict_impl.__getattribute__(self, 'lt'))[2] = key |
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91 dict_impl.__setattr__(self, 'lt', key) |
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92 |
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93 def __delitem__(self, key): |
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94 dict_impl = self._dict_impl() |
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95 pred, _ , succ = self._dict_impl().__getitem__(self, key) |
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96 if pred == _nil: |
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97 dict_impl.__setattr__(self, 'lh', succ) |
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98 else: |
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99 dict_impl.__getitem__(self, pred)[2] = succ |
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100 if succ == _nil: |
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101 dict_impl.__setattr__(self, 'lt', pred) |
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102 else: |
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103 dict_impl.__getitem__(self, succ)[0] = pred |
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104 dict_impl.__delitem__(self, key) |
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105 |
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106 def __contains__(self, key): |
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107 return key in self.keys() |
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108 |
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109 def __len__(self): |
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110 return len(self.keys()) |
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111 |
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112 def __str__(self): |
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113 pairs = ("%r: %r" % (k, v) for k, v in self.iteritems()) |
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114 return "{%s}" % ", ".join(pairs) |
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115 |
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116 def __repr__(self): |
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117 if self: |
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118 pairs = ("(%r, %r)" % (k, v) for k, v in self.iteritems()) |
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119 return "odict([%s])" % ", ".join(pairs) |
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120 else: |
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121 return "odict()" |
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122 |
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123 def get(self, k, x=None): |
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124 if k in self: |
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125 return self._dict_impl().__getitem__(self, k)[1] |
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126 else: |
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127 return x |
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128 |
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129 def __iter__(self): |
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130 dict_impl = self._dict_impl() |
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131 curr_key = dict_impl.__getattribute__(self, 'lh') |
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132 while curr_key != _nil: |
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133 yield curr_key |
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134 curr_key = dict_impl.__getitem__(self, curr_key)[2] |
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135 |
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136 iterkeys = __iter__ |
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137 |
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138 def keys(self): |
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139 return list(self.iterkeys()) |
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140 |
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141 def itervalues(self): |
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142 dict_impl = self._dict_impl() |
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143 curr_key = dict_impl.__getattribute__(self, 'lh') |
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144 while curr_key != _nil: |
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145 _, val, curr_key = dict_impl.__getitem__(self, curr_key) |
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146 yield val |
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147 |
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148 def values(self): |
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149 return list(self.itervalues()) |
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150 |
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151 def iteritems(self): |
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152 dict_impl = self._dict_impl() |
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153 curr_key = dict_impl.__getattribute__(self, 'lh') |
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154 while curr_key != _nil: |
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155 _, val, next_key = dict_impl.__getitem__(self, curr_key) |
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156 yield curr_key, val |
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157 curr_key = next_key |
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158 |
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159 def items(self): |
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160 return list(self.iteritems()) |
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161 |
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162 def sort(self, cmp=None, key=None, reverse=False): |
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163 items = [(k, v) for k, v in self.items()] |
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164 if cmp is not None: |
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165 items = sorted(items, cmp=cmp) |
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166 elif key is not None: |
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167 items = sorted(items, key=key) |
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168 else: |
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169 items = sorted(items, key=lambda x: x[1]) |
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170 if reverse: |
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171 items.reverse() |
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172 self.clear() |
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173 self.__init__(items) |
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174 |
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175 def clear(self): |
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176 dict_impl = self._dict_impl() |
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177 dict_impl.clear(self) |
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178 dict_impl.__setattr__(self, 'lh', _nil) |
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179 dict_impl.__setattr__(self, 'lt', _nil) |
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180 |
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181 def copy(self): |
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182 return self.__class__(self) |
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183 |
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184 def update(self, data=(), **kwds): |
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185 if kwds: |
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186 raise TypeError("update() of ordered dict takes no keyword " |
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187 "arguments to avoid an ordering trap.") |
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188 if hasattr(data, "iteritems"): |
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189 data = data.iteritems() |
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190 for key, val in data: |
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191 self[key] = val |
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192 |
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193 def setdefault(self, k, x=None): |
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194 try: |
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195 return self[k] |
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196 except KeyError: |
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197 self[k] = x |
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198 return x |
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199 |
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200 def pop(self, k, x=_nil): |
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201 try: |
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202 val = self[k] |
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203 del self[k] |
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204 return val |
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205 except KeyError: |
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206 if x == _nil: |
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207 raise |
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208 return x |
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209 |
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210 def popitem(self): |
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211 try: |
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212 dict_impl = self._dict_impl() |
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213 key = dict_impl.__getattribute__(self, 'lt') |
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214 return key, self.pop(key) |
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215 except KeyError: |
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216 raise KeyError("'popitem(): ordered dictionary is empty'") |
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217 |
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218 def riterkeys(self): |
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219 """To iterate on keys in reversed order. |
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220 """ |
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221 dict_impl = self._dict_impl() |
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222 curr_key = dict_impl.__getattribute__(self, 'lt') |
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223 while curr_key != _nil: |
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224 yield curr_key |
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225 curr_key = dict_impl.__getitem__(self, curr_key)[0] |
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226 |
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227 __reversed__ = riterkeys |
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228 |
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229 def rkeys(self): |
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230 """List of the keys in reversed order. |
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231 """ |
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232 return list(self.riterkeys()) |
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233 |
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234 def ritervalues(self): |
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235 """To iterate on values in reversed order. |
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236 """ |
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237 dict_impl = self._dict_impl() |
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238 curr_key = dict_impl.__getattribute__(self, 'lt') |
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239 while curr_key != _nil: |
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240 curr_key, val, _ = dict_impl.__getitem__(self, curr_key) |
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241 yield val |
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242 |
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243 def rvalues(self): |
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244 """List of the values in reversed order. |
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245 """ |
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246 return list(self.ritervalues()) |
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247 |
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248 def riteritems(self): |
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249 """To iterate on (key, value) in reversed order. |
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250 """ |
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251 dict_impl = self._dict_impl() |
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252 curr_key = dict_impl.__getattribute__(self, 'lt') |
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253 while curr_key != _nil: |
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254 pred_key, val, _ = dict_impl.__getitem__(self, curr_key) |
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255 yield curr_key, val |
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256 curr_key = pred_key |
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257 |
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258 def ritems(self): |
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259 """List of the (key, value) in reversed order. |
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260 """ |
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261 return list(self.riteritems()) |
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262 |
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263 def firstkey(self): |
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264 if self: |
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265 return self._dict_impl().__getattribute__(self, 'lh') |
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266 else: |
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267 raise KeyError("'firstkey(): ordered dictionary is empty'") |
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268 |
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269 def lastkey(self): |
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270 if self: |
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271 return self._dict_impl().__getattribute__(self, 'lt') |
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272 else: |
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273 raise KeyError("'lastkey(): ordered dictionary is empty'") |
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274 |
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275 def as_dict(self): |
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276 return self._dict_impl()(self.items()) |
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277 |
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278 def _repr(self): |
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279 """_repr(): low level repr of the whole data contained in the odict. |
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280 Useful for debugging. |
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281 """ |
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282 dict_impl = self._dict_impl() |
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283 form = "odict low level repr lh,lt,data: %r, %r, %s" |
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284 return form % (dict_impl.__getattribute__(self, 'lh'), |
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285 dict_impl.__getattribute__(self, 'lt'), |
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286 dict_impl.__repr__(self)) |
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287 |
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Changed OrderedDict implementation to pypy odict, in general it's the fastest and most reliable solution. Added OrderedTuple from python foundation.
Marcin Kuzminski <marcin@python-works.com>
parents:
diff
changeset
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288 class OrderedDict(_odict, dict): |
37625d304a16
Changed OrderedDict implementation to pypy odict, in general it's the fastest and most reliable solution. Added OrderedTuple from python foundation.
Marcin Kuzminski <marcin@python-works.com>
parents:
diff
changeset
|
289 |
37625d304a16
Changed OrderedDict implementation to pypy odict, in general it's the fastest and most reliable solution. Added OrderedTuple from python foundation.
Marcin Kuzminski <marcin@python-works.com>
parents:
diff
changeset
|
290 def _dict_impl(self): |
37625d304a16
Changed OrderedDict implementation to pypy odict, in general it's the fastest and most reliable solution. Added OrderedTuple from python foundation.
Marcin Kuzminski <marcin@python-works.com>
parents:
diff
changeset
|
291 return dict |