计算文件大小两种方法 递归和循环

递归：

def list_in(s):
    result = 0
    lst = os.listdir(s)
    for i in lst:
        i = s + "/" + i
        if os.path.isfile(i):
            result = result + os.path.getsize(i)
        elif os.path.isdir(i):
            ret = list_in(i)
            result = result + ret
    return result
print(list_in(r"G:/salar"))

循环：

lst = [r"G:/salar", ]
size_sum = 0
while lst :
    l_lst = lst.pop()
    list_name = os.listdir(l_lst)
    for i in list_name:
        ret = os.path.join(l_lst, i)
        if os.path.isdir(ret):
            lst.append(ret)
        else:
            size_sum += os.path.getsize(ret)
print(size_sum)