Mercurial > kallithea
annotate rhodecode/lib/vcs/utils/ordered_dict.py @ 2278:24095abde696 beta
print statement cleanup
author | Marcin Kuzminski <marcin@python-works.com> |
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date | Wed, 16 May 2012 01:24:23 +0200 |
parents | 324ac367a4da |
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rev | line source |
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2007
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1 """Ordered dict implementation""" |
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2 from UserDict import DictMixin |
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3 |
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4 |
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5 class OrderedDict(dict, DictMixin): |
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6 |
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7 def __init__(self, *args, **kwds): |
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8 if len(args) > 1: |
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9 raise TypeError('expected at most 1 arguments, got %d' % len(args)) |
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10 try: |
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11 self.__end |
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12 except AttributeError: |
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13 self.clear() |
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14 self.update(*args, **kwds) |
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15 |
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16 def clear(self): |
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17 self.__end = end = [] |
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18 end += [None, end, end] # sentinel node for doubly linked list |
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19 self.__map = {} # key --> [key, prev, next] |
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20 dict.clear(self) |
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21 |
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22 def __setitem__(self, key, value): |
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23 if key not in self: |
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24 end = self.__end |
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25 curr = end[1] |
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26 curr[2] = end[1] = self.__map[key] = [key, curr, end] |
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27 dict.__setitem__(self, key, value) |
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28 |
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29 def __delitem__(self, key): |
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30 dict.__delitem__(self, key) |
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31 key, prev, next = self.__map.pop(key) |
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32 prev[2] = next |
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33 next[1] = prev |
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34 |
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35 def __iter__(self): |
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36 end = self.__end |
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37 curr = end[2] |
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38 while curr is not end: |
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39 yield curr[0] |
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40 curr = curr[2] |
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41 |
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42 def __reversed__(self): |
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43 end = self.__end |
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44 curr = end[1] |
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45 while curr is not end: |
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46 yield curr[0] |
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47 curr = curr[1] |
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48 |
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49 def popitem(self, last=True): |
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50 if not self: |
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51 raise KeyError('dictionary is empty') |
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52 if last: |
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53 key = reversed(self).next() |
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54 else: |
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55 key = iter(self).next() |
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56 value = self.pop(key) |
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57 return key, value |
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58 |
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59 def __reduce__(self): |
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60 items = [[k, self[k]] for k in self] |
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61 tmp = self.__map, self.__end |
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62 del self.__map, self.__end |
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63 inst_dict = vars(self).copy() |
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64 self.__map, self.__end = tmp |
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65 if inst_dict: |
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66 return (self.__class__, (items,), inst_dict) |
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67 return self.__class__, (items,) |
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68 |
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69 def keys(self): |
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70 return list(self) |
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71 |
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72 setdefault = DictMixin.setdefault |
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73 update = DictMixin.update |
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74 pop = DictMixin.pop |
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75 values = DictMixin.values |
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76 items = DictMixin.items |
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77 iterkeys = DictMixin.iterkeys |
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78 itervalues = DictMixin.itervalues |
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79 iteritems = DictMixin.iteritems |
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80 |
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81 def __repr__(self): |
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82 if not self: |
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83 return '%s()' % (self.__class__.__name__,) |
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84 return '%s(%r)' % (self.__class__.__name__, self.items()) |
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85 |
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86 def copy(self): |
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87 return self.__class__(self) |
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88 |
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89 @classmethod |
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90 def fromkeys(cls, iterable, value=None): |
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91 d = cls() |
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92 for key in iterable: |
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93 d[key] = value |
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94 return d |
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95 |
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96 def __eq__(self, other): |
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97 if isinstance(other, OrderedDict): |
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98 return len(self) == len(other) and self.items() == other.items() |
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99 return dict.__eq__(self, other) |
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100 |
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101 def __ne__(self, other): |
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102 return not self == other |