Python lambda return value

April 16, 2022

I’m learning the lambda options to return in python and i have a question:

I need to fill the returns in this function:

def func(n):
   if n==0:
      print("finished")
   else:
      return ___
func(5)()()()()()
func(3)()()()
func(8)()()()()()()()()

The output:

finished
finished
finished

I thought this one is a recursive call like return func(n-1) but it doesn’t work, and throws an error.
Is there an option to overcome the extra empty brackets? count them? do something, because it should be runnable.

Thanks

>Solution :

You’re right about needing to use lambdas and func n-1, specifically

return lambda: func(n-1)

This returns a lambda that doesn’t need any parameters passed in, to handle the brackets, and the return of the is the function being called with n-1, which in most calls you’re making, is returning the next lambda function call