Naive question: in Python, isn't this solved by .copy and .deepcopy if you really have to get a copy of an object rather than create a new instance of something

Naive question: in Python, isn't this solved by .copy and .deepcopy if you really have to get a copy of an object rather than create a new instance of something? I'm curious where the bad API design is, unless you're saying that Python's assignment behavior itself is bad and everything should be immutable by default.