python - 是否可以在 python 中使 Instance == string/int/float 或任何数据类型为 True ？

Question

class Element:
    def __init__(self, name, value):
        self.name = name
        self.value = value

    def __repr__(self):
        return repr(self.value)


example = Element("project", "some project") 

example == "some project"  # False

有没有办法做出上述声明True而不是

example.value == "some project" # True

Answer 1

您可以尝试在类中重载 __eq__ 和 __ne__ 运算符。

class Element:
    def __init__(self, val):
        self.val = val
    def __eq__(self, other):
        return self.val == other

f = Element("some project")
f == "some project" # True