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annotate roundup/anypy/cmp_.py @ 7570:b0c459d1e2c2

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flake8: remove extra blank line
author John Rouillard <rouilj@ieee.org>
date Sun, 23 Jul 2023 23:23:38 -0400
parents 706f3be6ffbb
children dec7de56f253
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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9a09719b0d8e helper to allow comparing dicts and None values in Python 3
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1 try:
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2 None < 0
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3
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4 def NoneAndDictComparable(v):
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5 return v
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6 except TypeError:
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7 # comparator to allow comparisons against None and dict
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8 # comparisons (these were allowed in Python 2, but aren't allowed
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9 # in Python 3 any more)
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10 class NoneAndDictComparable(object):
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11 def __init__(self, value):
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12 self.value = value
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13
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14 def __cmp__(self, other):
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15 if not isinstance(other, self.__class__):
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16 raise TypeError('not comparable')
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17
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18 if self.value == other.value:
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19 return 0
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20
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21 elif self.value is None:
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22 return -1
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23
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24 elif other.value is None:
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25 return 1
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26
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27 elif type(self.value) == tuple and type(other.value) == tuple:
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28 for lhs, rhs in zip(self.value, other.value):
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29 lhsCmp = NoneAndDictComparable(lhs)
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30 rhsCmp = NoneAndDictComparable(rhs)
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31 result = lhsCmp.__cmp__(rhsCmp)
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32 if result != 0:
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33 return result
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34
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35 return len(self.value) - len(other.value)
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36
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37 elif type(self.value) == dict and type(other.value) == dict:
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38 diff = len(self.value) - len(other.value)
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39 if diff == 0:
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40 lhsItems = tuple(sorted(self.value.items(),
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41 key=NoneAndDictComparable))
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42 rhsItems = tuple(sorted(other.value.items(),
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43 key=NoneAndDictComparable))
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44 return -1 if NoneAndDictComparable(lhsItems) < NoneAndDictComparable(rhsItems) else 1
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45 else:
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46 return diff
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47
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48 elif self.value < other.value:
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49 return -1
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50
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51 else:
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52 return 1
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53
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54 def __eq__(self, other):
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55 return self.__cmp__(other) == 0
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57 def __ne__(self, other):
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58 return self.__cmp__(other) != 0
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60 def __lt__(self, other):
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61 return self.__cmp__(other) < 0
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63 def __le__(self, other):
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64 return self.__cmp__(other) <= 0
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66 def __ge__(self, other):
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67 return self.__cmp__(other) >= 0
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69 def __gt__(self, other):
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70 return self.__cmp__(other) > 0
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71
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73 def _test():
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74 import sys
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75 _py3 = sys.version_info[0] > 2
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77 Comp = NoneAndDictComparable
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78
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79 assert Comp(None) < Comp(0)
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80 assert Comp(None) < Comp('')
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81 assert Comp(None) < Comp({})
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82 assert Comp((0, None)) < Comp((0, 0))
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83 assert not Comp(0) < Comp(None)
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84 assert not Comp('') < Comp(None)
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85 assert not Comp({}) < Comp(None)
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86 assert not Comp((0, 0)) < Comp((0, None))
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87
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88 try:
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89 not Comp("") < Comp((0, None))
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90 if _py3:
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91 assert False, "Incompatible types are reporting comparable."
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92 except TypeError:
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93 pass
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94
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95 assert Comp((0, 0)) < Comp((0, 0, None))
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96 assert Comp((0, None, None)) < Comp((0, 0, 0))
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97
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98 assert Comp(0) < Comp(1)
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99 assert Comp(1) > Comp(0)
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100 assert not Comp(1) < Comp(0)
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101 assert not Comp(0) > Comp(0)
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102
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103 assert Comp(0) <= Comp(1)
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104 assert Comp(1) >= Comp(0)
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105 assert not Comp(1) <= Comp(0)
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106 assert Comp(0) >= Comp(0)
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107
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108 assert Comp({0: None}) < Comp({0: 0})
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109 assert Comp({0: 0}) < Comp({0: 1})
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111 assert Comp({0: 0}) == Comp({0: 0})
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112 assert Comp({0: 0}) != Comp({0: 1})
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113 assert Comp({0: 0, 1: 1}) > Comp({0: 1})
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114 assert Comp({0: 0, 1: 1}) < Comp({0: 0, 2: 2})
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115
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116
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117 if __name__ == '__main__':
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118 _test()
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