Python-сообщество

[1,2,2]  3
               [1, [2,2], 3]  4

[1,[2,[5,[6,8,9]]]]

def f_len(lst):
    a=0
    for element in lst:
        if type(element)==list:
            for e in element:
                if type(e)==list:
                    a =a + len(e)
                else:
                    a=a+1    
        else:
            a = a+1
    return a

def f(a):
    n = 0
    for i in a:
        if isinstance(i, list):
            n += f(i)
        else:
            n += 1
    return n

def f(a):
    return sum(f(i) if isinstance(i, list) else 1 for i in a)