mirror of
https://github.com/pocketpy/pocketpy
synced 2025-10-30 16:30:16 +00:00
95 lines
2.2 KiB
Python
95 lines
2.2 KiB
Python
class set:
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def __init__(self, iterable=None):
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iterable = iterable or []
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self._a = {}
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for item in iterable:
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self.add(item)
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def add(self, elem):
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self._a[elem] = None
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def discard(self, elem):
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if elem in self._a:
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del self._a[elem]
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def remove(self, elem):
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del self._a[elem]
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def clear(self):
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self._a.clear()
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def update(self,other):
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for elem in other:
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self.add(elem)
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return self
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def __len__(self):
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return len(self._a)
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def copy(self):
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return set(self._a.keys())
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def __and__(self, other):
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ret = set()
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for elem in self:
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if elem in other:
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ret.add(elem)
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return ret
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def __or__(self, other):
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ret = self.copy()
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for elem in other:
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ret.add(elem)
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return ret
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def __sub__(self, other):
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ret = set()
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for elem in self:
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if elem not in other:
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ret.add(elem)
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return ret
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def __xor__(self, other):
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ret = set()
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for elem in self:
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if elem not in other:
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ret.add(elem)
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for elem in other:
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if elem not in self:
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ret.add(elem)
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return ret
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def union(self, other):
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return self | other
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def intersection(self, other):
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return self & other
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def difference(self, other):
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return self - other
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def symmetric_difference(self, other):
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return self ^ other
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def __eq__(self, other):
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return self.__xor__(other).__len__() == 0
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def isdisjoint(self, other):
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return self.__and__(other).__len__() == 0
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def issubset(self, other):
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return self.__sub__(other).__len__() == 0
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def issuperset(self, other):
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return other.__sub__(self).__len__() == 0
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def __contains__(self, elem):
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return elem in self._a
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def __repr__(self):
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if len(self) == 0:
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return 'set()'
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return '{'+ ', '.join([repr(i) for i in self._a.keys()]) + '}'
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def __iter__(self):
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return iter(self._a.keys()) |