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20 lines
312 B
Python
20 lines
312 B
Python
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"""
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Module docs
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"""
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from typing import TypeAlias
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class Nil():
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def __eq__(self, other):
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if isinstance(other, Nil):
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return True
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return other is None
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# 不等于
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def __ne__(self, other):
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return not self.__eq__(other)
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nil = Nil()
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err: TypeAlias = Exception | Nil
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