Modify function signature and docstring in Python decorator

Question

I have a decorator that reduce the function parameters, and I want to show it in the python help. A dummy example:

# The decorator
def dummy_decor(fun):
    def wrapper(*argv, **kwargs):
        n = 5
        return fun(n, *argv)
    return wrapper 

# functions to decorate
def summ(a,b):
    return a+b

def summm(a,b,c):
    return a+b+c

# The new functions
new_summ = dummy_decor(summ)
new_summm = dummy_decor(summm)

I will use the original function and the decorated ones. If I do a help(new_summ) the output is:

Help on function wrapper in module __main__:

wrapper(*argv, **kwargs)

But I want this:

Help on function summ in module __main__:

summ(a)

question from:https://stackoverflow.com/questions/65831708/modify-function-signature-and-docstring-in-python-decorator

Answer 1

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