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 changesets total_time 30.3608012199 average on req 0.303608012199 Total: 475 MB
author Marcin Kuzminski <marcin@python-works.com>
date Sun, 15 May 2011 18:29:33 +0200
parents 37625d304a16
children
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rev   line source
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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:
37625d304a16 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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103 dict_impl.__getitem__(self, succ)[0] = pred
37625d304a16 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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diff changeset
104 dict_impl.__delitem__(self, key)
37625d304a16 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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diff changeset
105
37625d304a16 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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diff changeset
106 def __contains__(self, key):
37625d304a16 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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diff changeset
107 return key in self.keys()
37625d304a16 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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diff changeset
108
37625d304a16 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:
diff changeset
109 def __len__(self):
37625d304a16 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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diff changeset
110 return len(self.keys())
37625d304a16 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:
diff changeset
111
37625d304a16 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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diff changeset
112 def __str__(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>
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diff changeset
113 pairs = ("%r: %r" % (k, v) for k, v in self.iteritems())
37625d304a16 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:
diff changeset
114 return "{%s}" % ", ".join(pairs)
37625d304a16 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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115
37625d304a16 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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diff changeset
116 def __repr__(self):
37625d304a16 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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diff changeset
117 if self:
37625d304a16 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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diff changeset
118 pairs = ("(%r, %r)" % (k, v) for k, v in self.iteritems())
37625d304a16 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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diff changeset
119 return "odict([%s])" % ", ".join(pairs)
37625d304a16 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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120 else:
37625d304a16 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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121 return "odict()"
37625d304a16 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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122
37625d304a16 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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123 def get(self, k, x=None):
37625d304a16 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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124 if k in self:
37625d304a16 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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125 return self._dict_impl().__getitem__(self, k)[1]
37625d304a16 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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126 else:
37625d304a16 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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127 return x
37625d304a16 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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128
37625d304a16 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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129 def __iter__(self):
37625d304a16 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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130 dict_impl = self._dict_impl()
37625d304a16 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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131 curr_key = dict_impl.__getattribute__(self, 'lh')
37625d304a16 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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132 while curr_key != _nil:
37625d304a16 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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133 yield curr_key
37625d304a16 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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134 curr_key = dict_impl.__getitem__(self, curr_key)[2]
37625d304a16 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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135
37625d304a16 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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136 iterkeys = __iter__
37625d304a16 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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137
37625d304a16 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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138 def keys(self):
37625d304a16 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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139 return list(self.iterkeys())
37625d304a16 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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140
37625d304a16 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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141 def itervalues(self):
37625d304a16 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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142 dict_impl = self._dict_impl()
37625d304a16 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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diff changeset
143 curr_key = dict_impl.__getattribute__(self, 'lh')
37625d304a16 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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diff changeset
144 while curr_key != _nil:
37625d304a16 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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diff changeset
145 _, val, curr_key = dict_impl.__getitem__(self, curr_key)
37625d304a16 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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diff changeset
146 yield val
37625d304a16 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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147
37625d304a16 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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diff changeset
148 def values(self):
37625d304a16 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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diff changeset
149 return list(self.itervalues())
37625d304a16 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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150
37625d304a16 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:
diff changeset
151 def iteritems(self):
37625d304a16 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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diff changeset
152 dict_impl = self._dict_impl()
37625d304a16 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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diff changeset
153 curr_key = dict_impl.__getattribute__(self, 'lh')
37625d304a16 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:
diff changeset
154 while curr_key != _nil:
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
155 _, val, next_key = dict_impl.__getitem__(self, curr_key)
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
156 yield curr_key, val
37625d304a16 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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diff changeset
157 curr_key = next_key
37625d304a16 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:
diff changeset
158
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
159 def items(self):
37625d304a16 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:
diff changeset
160 return list(self.iteritems())
37625d304a16 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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diff changeset
161
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
162 def sort(self, cmp=None, key=None, reverse=False):
37625d304a16 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:
diff changeset
163 items = [(k, v) for k, v in self.items()]
37625d304a16 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:
diff changeset
164 if cmp is not None:
37625d304a16 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:
diff changeset
165 items = sorted(items, cmp=cmp)
37625d304a16 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:
diff changeset
166 elif key is not None:
37625d304a16 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:
diff changeset
167 items = sorted(items, key=key)
37625d304a16 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:
diff changeset
168 else:
37625d304a16 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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diff changeset
169 items = sorted(items, key=lambda x: x[1])
37625d304a16 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:
diff changeset
170 if reverse:
37625d304a16 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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diff changeset
171 items.reverse()
37625d304a16 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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diff changeset
172 self.clear()
37625d304a16 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:
diff changeset
173 self.__init__(items)
37625d304a16 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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diff changeset
174
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
175 def clear(self):
37625d304a16 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:
diff changeset
176 dict_impl = self._dict_impl()
37625d304a16 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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diff changeset
177 dict_impl.clear(self)
37625d304a16 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:
diff changeset
178 dict_impl.__setattr__(self, 'lh', _nil)
37625d304a16 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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diff changeset
179 dict_impl.__setattr__(self, 'lt', _nil)
37625d304a16 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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diff changeset
180
37625d304a16 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:
diff changeset
181 def copy(self):
37625d304a16 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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diff changeset
182 return self.__class__(self)
37625d304a16 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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diff changeset
183
37625d304a16 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:
diff changeset
184 def update(self, data=(), **kwds):
37625d304a16 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:
diff changeset
185 if kwds:
37625d304a16 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:
diff changeset
186 raise TypeError("update() of ordered dict takes no keyword "
37625d304a16 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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diff changeset
187 "arguments to avoid an ordering trap.")
37625d304a16 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:
diff changeset
188 if hasattr(data, "iteritems"):
37625d304a16 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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diff changeset
189 data = data.iteritems()
37625d304a16 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:
diff changeset
190 for key, val in data:
37625d304a16 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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diff changeset
191 self[key] = val
37625d304a16 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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diff changeset
192
37625d304a16 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:
diff changeset
193 def setdefault(self, k, x=None):
37625d304a16 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:
diff changeset
194 try:
37625d304a16 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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diff changeset
195 return self[k]
37625d304a16 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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diff changeset
196 except KeyError:
37625d304a16 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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diff changeset
197 self[k] = x
37625d304a16 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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diff changeset
198 return x
37625d304a16 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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diff changeset
199
37625d304a16 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:
diff changeset
200 def pop(self, k, x=_nil):
37625d304a16 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:
diff changeset
201 try:
37625d304a16 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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diff changeset
202 val = self[k]
37625d304a16 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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diff changeset
203 del self[k]
37625d304a16 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:
diff changeset
204 return val
37625d304a16 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:
diff changeset
205 except KeyError:
37625d304a16 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:
diff changeset
206 if x == _nil:
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
207 raise
37625d304a16 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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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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288 class OrderedDict(_odict, dict):
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289
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290 def _dict_impl(self):
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291 return dict