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在 python 中，有什么方法可以检查对象是不可变的还是可变的？
像 isimmutable(a) 会返回 True，如果 a 是不可变的，否则返回 False。
<分区>
在 python 中，有什么方法可以检查对象是不可变的还是可变的？
像 isimmutable(a) 会返回 True，如果 a 是不可变的，否则返回 False。
最佳答案
没有通用的不变性测试。仅当对象的任何方法都不能改变底层数据时，该对象才是不可变的。
看看这个question
答案是:
1) Keys must not be mutable, unless you have a user-defined class that is hashable but also mutable. That's all that's forced upon you. However, using a hashable, mutable object as a dict key might be a bad idea.
2) By not sharing values between the two dicts. It's OK to share the keys, because they must be immutable. Copying the dictionary, in the copy module sense, is definitely safe. Calling the dict constructor here works, too: b = dict(a). You could also use immutable values.
3) All built-in immutable types are hashable. All built-in mutable types are not hashable. For an object to be hashable, it must have the same hash over its entire lifetime, even if it is mutated.
4) Not that I'm aware of; I'm describing 2.x.
A type is mutable if it is not immutable. A type is immutable if it is a built-in immutable type: str, int, long, bool, float, tuple, and probably a couple others I'm forgetting. User-defined types are always mutable.
An object is mutable if it is not immutable. An object is immutable if it consists, recursively, of only immutable-typed sub-objects. Thus, a tuple of lists is mutable; you cannot replace the elements of the tuple, but you can modify them through the list interface, changing the overall data
这应该回答你的问题
关于python - 如何检查不变性，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/17875177/