How do nested functions work in Python?

Question

def maker(n):
    def action(x):
        return x ** n
    return action

f = maker(2)
print(f)
print(f(3))
print(f(4))

g = maker(3)
print(g(3))

print(f(3)) # stil         


        

Answer 1

Because at the time when you create the function, n was 2, so your function is:

def action(x):
    return x ** 2

When you call f(3), x is set to 3, so your function will return 3 ** 2