Python is generally terrible at providing immutable types and workflows. No such thing as a constant, class variables are mutable by default, no built-in immuta

Python is generally terrible at providing immutable types and workflows. No such thing as a constant, class variables are mutable by default, no built-in immutable dictionary class, etc. I use a linter to catch this sort of thing and subclass `collections.namedtuple(...)` whenever I need to at least try to abolish mutability. It's one of the worst things about the language. [edit] You can argue that there would be use cases for mutable defaults, and as with any edge use case you'd be right in asserting its existence. Unfortunately, I can't think of any solution (typing, changing function argument evaluation rules, etc) that wouldn't fundamentally change the language and break just about every sizable python library in existence. This looseness is baked deep into the language as far as I can see.