Detect useless copy/deepcopy

[fc-asad]

Current problem

I have seen code where a copy/deepcopy of an immutable data is made. As far as I understand, it is a useless operation.

Desired solution

Pylint should detect when copy/deepcopy of an immutable object is made and generate an error.

Additional context

No response

[Pierre-Sassoulas]

+1, but inferring if something is immutable is hard, so the check would be limited to known immutable type or the false positives would make this check unusable.