THE BRACES ARE ACTUALLY NOT PART OF A FUNCTION'S NAME
SO LET'S TRY REMOVING THEM

def print_doof():
    print('doof')

f = print_doof


def mach_n(f,n):
    if n <= 0:
        return
    f
    mach_n(f,n-1)
    

mach_n(f,6)

RUN MODULE

 RESTART: C:\Users\Henrike
Schwenn\Roaming\Programs\Python\Python36\eigene Funktionen\rekursive
Funktionen\mach_n mit Funktionsobjekt.py 
>>> 

PYTHON DOESN'T RETURN ANYTHING