Can anybody explain this?

Question

def add(x, y):
return x + y

def do_twice(func, x, y):
return func(func(x, y), func(x, y))

a = 5
b = 10

print(do_twice(add, a, b))

Answer 1

1) the first function takes two numbers and return their sum.
2) the second function takes three argument, the first is a function and the other two are numbers.
What follows is this...

Add(add(5,10) , add(5,10))
Add(15, 15)
30
Hope you get this