我尝试搜索互联网，但找不到 hashable 的含义。

当他们说对象是 hashable 或 hashable objects 是什么意思？

最佳答案

来自 Python glossary :

An object is hashable if it has a hash value which never changes during its lifetime (it needs a __hash__() method), and can be compared to other objects (it needs an __eq__() or __cmp__() method). Hashable objects which compare equal must have the same hash value.

Hashability makes an object usable as a dictionary key and a set member, because these data structures use the hash value internally.

All of Python’s immutable built-in objects are hashable, while no mutable containers (such as lists or dictionaries) are. Objects which are instances of user-defined classes are hashable by default; they all compare unequal, and their hash value is their id().

关于python - "hashable"在 Python 中是什么意思？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/14535730/