Python - Global, Local and Nonlocal Variables

scope.py

v = 0  # global variable


def a():
    def test(n):
        nonlocal m  # used in nested function whose local scope is not defined
        global v  # outside of function or in global scope
        if n == 5:
            return n
        t = test(n + 1)  # local variable
        m += t + n
        v += t + n
        return n + t

    m = 0
    test(1)

    print(m)


a()