python 运算符 与 特殊函数对应关系

in —- $__contains__$

https://docs.python.org/3.6/reference/expressions.html#in

  • 注意

    • 对于 builtin.list 类型

      • 内部比较的好像是引用
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class Hello:
    pass


if __name__ == '__main__':
    assert (Hello() in [Hello()]) is False

    t = Hello()
    assert (t in [t]) is True