Caching functions

cache.py

#!/usr/bin/python3.9
cfd = dict()# cfd for cache_func_dict
def cache(func):
 def wrapper(*args, **kwargs):
  val = None
  if func in cfd:
   inner_dict = cfd[func]
   if args in inner_dict:
    val = inner_dict[args]
   else:
    val = func(*args, **kwargs)
    cfd[func][args] = val
  else:
   val = func(*args, **kwargs)
   cfd[func] = dict()
   cfd[func][args] = val
  return val
   
 return wrapper
 
@cache
def fib(a: int) -> int:
 if a < 2:
  return a# start with 0 1
 return fib(a-1)+fib(a-2)

def main():
 for _ in range(401):
  print(f'{_}: {fib(_)}')
 for _ in range(401):
  print(f'{_}: {fib(_)}')

if __name__ == "__main__":
 main()

I saw that python's adding a cache decorator, to allow for memoization without much added difficulty. Just saw a video on wrappers and thought I'd give it a shot. Works but I need another case.