Having troubles with this code

Question

Having troubles at line 10. It's recognizing _enter_ as an Attribute Error

from functools import reduce
mul = lambda n1,n2: n1*n2
class cls:
def _enter_(self):
def f(n):
return reduce(mul,range(2,n+1),1)
return f
def _exit_(self,*args):
pass
with cls() as a:
print(a(5))

Answer 1

rather, python notice that you probably write _enter_ instead of __enter__ (magic method takes two underscore before and after name)...

same for _exit_ wich should maybe written __exit__ ^^