How to use the following code for recursion?

Question

Want to implement do twice function code to recursion
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

Try this:
total = []
count =0

def twice(x,y,c,t): 
  if c ==2:
    return
  else:
    total.append(x+y)
  twice(x,y,c+1,t)

twice(5,10,count,total)
print(sum(total))

Answer 2

What you did is not really recursion. You should have a condition to stop and the recusive function call in your function.
You could do this:
def foo(func, x, y, i):
if i==1:
return func(x, y)
temp = foo(func, x, y, i+1)
return func(temp, temp)

And call it with foo(add, 5, 10, 0)