please explain the python code.

Question

hello. please explain the code

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))

I don't understand the lines 4 and 5.

thank you.
link: https://code.sololearn.com/339/#py

Answer 1

Lines 4 and 5 are the definition of a method do_twice(). This method takes as arguments: a function and two additional parameters x and y.

So whenever you call the do_twice method, it executes the function passed as its first attribute and passes x and y to that function -- and does this twice.

This is why, when x and y (or a and b) are passed as 5 and 10, while add() is passed as the function to be executed, calling the do_twice() method does and returns the following equation:

add(add(5, 10), add(5, 10)) --> add(15, 15) --> 30

Sounds easy? :)

Answer 2

easy? not really but I am a bad ass. I will learn.
Thank you for clarification