What functools.wraps does

Question

Accepted Answer

When you wrap a function, the wrapper replaces it - so without functools.wraps, the decorated function's __name__ becomes 'wrapper' and its docstring disappears. That breaks tools like help(), logging, and debuggers that rely on the function's name. Adding @functools.wraps(func) to your inner wrapper copies __name__, __qualname__, __doc__, __annotations__, and __module__ over automatically. It is one line and you should always include it in any decorator you write.