What are *args and **kwargs in Python, and how do they differ from a deep copy?

In Python, args and kwargs are special syntax used in function definitions to allow a variable number of arguments. args collects any extra positional arguments into a tuple, while kwargs collects any extra keyword arguments into a dictionary. They enable flexible APIs, such as def func(args, kwargs): pass. A deep copy, created with copy.deepcopy(), recursively copies an object and all objects it references, producing a completely independent clone. Unlike args and kwargs, which are about argument passing, deep copy is about duplicating data structures. For example, modifying a nested list inside a deep‑copied list does not affect the original. In contrast, passing a list via args simply passes a reference; changes to the list inside the function affect the original. Thus, args/**kwargs are for flexible function signatures, while deep copy is for creating independent copies of mutable objects.