python26实例[subst然后删除文件夹]

时间：2011-03-22 来源：iTech

有些时候某些文件夹下的文件路径太长，超出了windows系统的限制，导致此文件夹不能被删除。此时我们需要先subst此文件夹然后再删除，以下脚本帮你自动完成。

代码:

import os
import sys
import shutil
import subprocess

def runCommand(cmd):
  return subprocess.call(cmd)

def substDriveForPath(drive, path):
  substcmd = "subst" + " " + drive + " " + path
  return runCommand(substcmd)

def unSubstDriveForPath(drive):
  unsubstcmd = "subst" + " " +drive + " " + "/d"
  runCommand(unsubstcmd)

def autoSubst(path):
  result = False

  useddrive = ""
  for drive in "ZYXWVUTSRQPONMLKJIHGFEDCBA":
    fulldrive = drive + ":"
    returncode = substDriveForPath(fulldrive,path)
    if(returncode == 0):
      useddrive = fulldrive
      break
  if(not useddrive == ""):
    result = True

  return result, useddrive

def rmDirwithSubst(dir, subst = True):

  if not os.path.exists(dir) and not os.path.isdir(dir) :
        print 'path %s is not existed or is not a directory' %dir
        return False

  if subst:
    parent, curdir = os.path.split(dir)
    re, d = autoSubst(parent)
    if re == False :
      print  'subst failed'
      return False
    dir = d + '\\' + curdir

  shutil.rmtree(dir)
  unSubstDriveForPath(d)

  return True

def usage():
  usage = '\
  When the dirctory cannot be removed in which some files path are too long.\n\
  Usage: python %s folder1 [folder2 ...]\n' %sys.argv[0]
  print usage

if __name__ == '__main__':
  if len(sys.argv) < 2 : usage()
  for folder in sys.argv[1:]:
    rmDirwithSubst(folder)

完！