os.walk() 用于遍历目标文件路径的所有看见的看不见的文件和夹

import os
def count_file_size(pathroot):
    print(pathroot)
    res = 0
    for roots,dirs,files in os.walk(pathroot):
        for file in files:
            path = os.path.join(roots,file)
            print(path)
            res += os.path.getsize(path)
    return res
path = os.path.dirname(__file__)
print(count_file_size(path))