Need some help on this

Question

def apply_twice(func, arg):
return func(func(arg))

def add_five(x):
return x + 5

print(apply_twice(add_five, 10))

Answer 1

The output is 20, right?

Answer 2

What the apply_twice function does is it calls the function twice, the second time using the result of the first one

First on the inside: add_five(10) returns 15

The outside: add_five(15) returns 20

The 20 returned above then gets printed out

Answer 3

What you're trying to do here can be done using a mechanic called "decorator"
Even if it's a little bit more advanced, I'd advise you to take a look on the web

Answer 4

https://www.sololearn.com/discuss/1418789/?ref=app
https://www.sololearn.com/discuss/1635939/?ref=app
https://www.sololearn.com/discuss/1423251/?ref=app