I am learning how to use decorator in Python. Here I use two different decorator to a function.

Why is the attribute call_count from the first decorator lost, after I use the second decorator?

Does it still exist in memory, but I can’t find a way to access it?

def fib(n):
    if n == 0:
        return 0
    elif n == 1:
        return 1
    else:
        return fib(n - 2) + fib(n - 1)

def count(f):
    def counted(n):
        counted.call_count += 1
        return f(n)

    counted.call_count = 0
    return counted


def count_frames(f):
    def counted(n):
        counted.open_count += 1
        counted.max_count = max(counted.max_count, counted.open_count)
        result = f(n)
        counted.open_count -= 1
        return result

    counted.open_count = 0
    counted.max_count = 0
    return counted


fib = count(fib)
fib = count_frames(fib)
print(fib(19), fib.__dict__)

I thought fib.__dict__ would contain the attribute call_count, but it only contains the attributes open_count and max_count from the second decorator