TypeError: 'NoneType' object is not callable

[deanhystad]

I searched the net and read some pages but I did not understand how to correct the code.

I googled "TypeError: 'NoneType' object is not callable" and this was the very first hit.

https://www.geeksveda.com/typeerror-none...-callable/

“TypeError: 'nonetype' object is not callable” occurs when you try to call a None value as if it were a function. To solve it, make sure that you do not override the names of any functions with a None value.

This is exactly what you did here.

def memorize(func):
    cash={}
    def wrapper(*args):
        if args in cash:
            return cash[args]
        else:
            result=func(*args)
            cash[atgs]=result
            return result
        return wrapper  # <-- Indentation error

Because of the indentation error, calling memorize(sum_of_odd_numbers) returns None when you wanted it to return sum_ov_numbers.wrapper. This means when you called sum_of_odd_numbers(10) you ended up calling None(10).