python遍历文件

import os
import os.path

rootdir = r"C:\Users\leiyi\Desktop\1"  # 指明被遍历的文件夹
#要加上r，否则会报错(unicode error) 'unicodeescape' codec can't decode bytes in position 2-3: truncated \UXXXXXXXX escape 错误
for parent, dirnames, filenames in os.walk(rootdir):  # 三个参数：分别返回1.父目录 2.所有文件夹名字（不含路径） 3.所有文件名字
    for dirname in dirnames:  # 输出文件夹信息
        print("parent is:" + parent)

        print("dirname is" + dirname)


    for filename in filenames:  # 输出文件信息
        print( "parent is:" + parent)

        print("filename is:" + filename)

        print( "the full name of the file is:" + os.path.join(parent, filename))
         # 输出文件路径信息