def other_deco(func):
    @wraps(func)
    def wrapper():
        return func()
    return wrapper

 def countcalls(func):
    @wraps(func)
    def wrapper():
        wrapper.calls += 1
        return func()
    wrapper.calls = 0
    return wrapper

 @other_deco
 @countcalls
 def f1():
     pass
 f1()
 f1()
 f1()
 print(f1.calls) # 0 (хотя ожидаю 3)