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annotate lib/python3.8/site-packages/pip/_internal/utils/models.py @ 0:9e54283cc701 draft

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"planemo upload commit d12c32a45bcd441307e632fca6d9af7d60289d44"
author guerler
date Mon, 27 Jul 2020 03:47:31 -0400
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1 """Utilities for defining models
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2 """
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3 # The following comment should be removed at some point in the future.
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4 # mypy: disallow-untyped-defs=False
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5
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6 import operator
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7
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8
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9 class KeyBasedCompareMixin(object):
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10 """Provides comparison capabilities that is based on a key
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11 """
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12
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13 def __init__(self, key, defining_class):
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14 self._compare_key = key
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15 self._defining_class = defining_class
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16
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17 def __hash__(self):
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18 return hash(self._compare_key)
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19
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20 def __lt__(self, other):
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21 return self._compare(other, operator.__lt__)
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23 def __le__(self, other):
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24 return self._compare(other, operator.__le__)
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26 def __gt__(self, other):
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27 return self._compare(other, operator.__gt__)
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29 def __ge__(self, other):
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30 return self._compare(other, operator.__ge__)
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32 def __eq__(self, other):
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33 return self._compare(other, operator.__eq__)
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34
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35 def __ne__(self, other):
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36 return self._compare(other, operator.__ne__)
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37
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38 def _compare(self, other, method):
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39 if not isinstance(other, self._defining_class):
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40 return NotImplemented
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41
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42 return method(self._compare_key, other._compare_key)