python 转换代码格式

import os
dirname="C:\\Users\\haier\\Desktop\\new"

def walk(path):
    for item in os.listdir(path):
        subpath = os.path.join(path, item)
        #subpath=subpath.replace('\\','\\\\')
        print subpath
        for i in open(subpath):
            pass#print i
        ffrom=open(subpath,'r')
        fto=open(subpath+"",'w')
        while True:
            l=ffrom.readline()
            if not l:
                break
            if 'endif' in l:
                print l
                l=l.replace('endif','end')
                print l
            elif 'endwhile' in l:
                print l
                l=l.replace('endwhile','end')
                print l
            # if '\"' in l:
                # print l
                # l=l.replace('\"','\'')
                # print l
              #  print l
               # tmp=l.split("\"")
                #l=tmp[0]+"\'"+tmp[1]
            fto.write(l)
        ffrom.close()
        fto.close()

def dele(path):
   for item in os.listdir(path):
        subpath = os.path.join(path, item)
       # subpath=subpath.replace('\\','\\\\')

        if os.path.exists(subpath+""):
            ffrom=open(subpath+"",'r')
            fto=open(subpath,'w')
            while True:
                l=ffrom.readline()
                if not l:
                    break
                fto.write(l)
            ffrom.close()
            fto.close()
            os.remove(subpath+"")

walk(dirname)
dele(dirname)