Example of Python batch deleting and renaming a folder

#!/usr/bin/python
# -*- coding: UTF-8 -*-

import sys
import os
import shutil

pwd = ()
L = (".")
f = open("", "w")
for dirname in L:
 if (dirname):
  print("dir name:" + dirname)
  (dirname)
  files = (".")
  filePreName = "filename"
  extName = "ext name"
  delete = True
  for filename in files:
   print filename
   print >> f, "%s" % filename
   filePreName, extName = (filename)
   if () == ".zip" or () == ".jpg" or () == ".doc" or () == ".pdf" or () == ".xls" or () == ".gif" or () == ".ppt" or () == ".iso" or () == ".mp3" or () == ".wav" or () == ".rar" or () == ".mkv" or () == ".mp4" or () == ".bmp" or () == ".exe" or () == ".docx" or () == ".png" or () == ".txt":
    delete = False
  ("..")
  if delete:
   (dirname)
   print dirname + " deleted!!!"
   print >> f, "%s" % dirname + " deleted!!!"
  print "--------------------------"
  print >> f, "%s" % "--------------------------"
()1

#!/usr/bin/python
# -*- coding: UTF-8 -*-

import sys
import os
import shutil

pwd = ()
L = (".")
f = open("", "w")
for dirname in L:
 if (dirname):
  print("dir name:" + dirname)
  (dirname)
  files = (".")
  i = 0
  filePreName = "filename"
  extName = "ext name"
  for filename in files:
   print filename
   print >> f, "%s" % filename
   filePreName, extName = (filename)
   if extName == ".java" or extName == ".js" or extName == ".yml" or extName == ".ejs" or extName == ".svg" or extName == ".sample" or extName == ".styl" or extName == ".class" or extName == ".xml" or extName == ".html" or extName == ".so" or extName == ".OPA" or extName == ".pig" or extName == ".obj" or extName == ".sdb" or extName == ".dll":
    i += 1
  ("..")
  #When organizing a cluttered hard drive, extraneous folders containing these file types are simply deleted
  if i >= 3 or filePreName == "HEAD" or filePreName == "master" or extName == "" or (filePreName == "index" and extName == ".html") or extName == ".java" or extName == ".pyc" or extName == ".py" or extName == ".html" or extName == ".HTM" or extName == ".ini" or extName == ".css" or extName == ".so" or extName == ".xml" or extName == ".bin":
    (dirname)
    print(dirname + " deleted!!!")
    print "--------------------------"
    continue
  deleteOrNot = raw_input("delete " + dirname + "?(y/n)")
  # I decide whether to delete or rename folders by diameter, except for extraneous folders.
  if deleteOrNot == 'y':
   (dirname)
   print dirname + " deleted!!!"
   print >> f, "%s" % dirname + " deleted!!!"   
  else:
   if deleteOrNot == "":
    print "no change" + dirname
   else:
    (dirname, deleteOrNot)
  print "--------------------------"
  print >> f, "%s" % "--------------------------"
()

#!/usr/bin/python
# -*- coding: UTF-8 -*-

import sys
import os
import shutil
import random

pwd = ()
L = (".")
f = open("", "w")
for dirname in L:
 if (dirname):
  (dirname)
  files = (".")
  filePreName = "filename"
  extName = "ext name"
  filename = files[0]
  filePreName, extName = (filename)
  ("..")
  (dirname, filePreName + str((1,999)))
  print dirname + "->" + filePreName + str((1,999))
  print >> f, "%s" % dirname + "->" + filePreName + str((1,999))
()