python循环解压rar文件

C:.

│  main.py

│

├─1_STL_算法简介

│      STL_算法简介.rar

│

└─2_STL_算法_填充新值

        STL_算法_填充新值.rar

事情是这样的，下载了一套教学视频，文件夹命名规则是：“序号+视频名”，文件夹内是“视频名.rar”，上面选取了其中两个文件作为示例。这样看视频的时候就出现一个问题，每看一次都需要切换一次目录，解压一次文件，烦！

遂写main.py

import rarfile

import shutil

import os

path = os.getcwd()

allFile = os.listdir(path)

for dir in allFile:

    if '.' not in dir:

        dir2 = os.listdir(path+'\\'+dir)

        for file in dir2:

            if '.rar' in file:

                rar = rarfile.RarFile(path+'\\'+dir+'\\'+file)

                rar.extractall(path+'\\'+dir)

        dir2 = os.listdir(path+'\\'+dir)

        for file in dir2:

            if '.wmv' in file:

                print(dir)

                print(file)

                os.chdir(path+'\\'+dir)

                os.rename(file, dir+'.wmv')

                shutil.copy2(dir+'.wmv', path)

                os.chdir(path)

出现问题：

Traceback (most recent call last):

  File "C:\Python35\lib\site-packages\rarfile.py", line 2813, in custom_popen

    creationflags=creationflags)

  File "C:\Python35\lib\subprocess.py", line 676, in __init__

    restore_signals, start_new_session)

  File "C:\Python35\lib\subprocess.py", line 955, in _execute_child

    startupinfo)

FileNotFoundError: [WinError 2] 系统找不到指定的文件。

During handling of the above exception, another exception occurred:

Traceback (most recent call last):

  File "C:\Users\Administrator\Desktop\新建文件夹 (2)\main.py", line 14, in <module>

    rar.extractall(path+'\\'+dir)

  File "C:\Python35\lib\site-packages\rarfile.py", line 820, in extractall

    self._extract(fnlist, path, pwd)

  File "C:\Python35\lib\site-packages\rarfile.py", line 885, in _extract

    p = custom_popen(cmd)

  File "C:\Python35\lib\site-packages\rarfile.py", line 2816, in custom_popen

    raise RarCannotExec("Unrar not installed? (rarfile.UNRAR_TOOL=%r)" % UNRAR_TOOL)

rarfile.RarCannotExec: Unrar not installed? (rarfile.UNRAR_TOOL='unrar')

下载UnRar.exe

链接：http://pan.baidu.com/s/1o8ObqCa 密码：dsru

放在当前文件夹，运行main.py。

目录树变为：

C:.

│  1_STL_算法简介.wmv

│  2_STL_算法_填充新值.wmv

│  main.py

│  UnRAR.exe

│

├─1_STL_算法简介

│      1_STL_算法简介.wmv

│      STL_算法简介.rar

│

└─2_STL_算法_填充新值

        2_STL_算法_填充新值.wmv

        STL_算法_填充新值.rar