Питон в примерах. 1

Простой скрипт, который в заданной папке ищет все файлы в которых есть строка1 и меняет ей на строку2.

import os, sys, string
'''
find findStr and replace by repStr in all *.html files of selected directory
usage:
   python findandreplace.py /home/user/path findStr repString
'''

findStr   = ''
repStr    = ''
fileCounter = 0

def readFile(path):
   fh = open(path, "r")
   buf = fh.read()
   fh.close()
   return buf

def writeFile(path, str):
   fh = open(path, "w")
   fh.write(str)
   fh.close()


def replaceStringInFile(findStr,repStr,filePath):
 "replaces all findStr by repStr in file filePath"
 
 global fileCounter

 buf = readFile(filePath)
 bunew = ''
 
 if buf.find(findStr) != -1:
  bufnew = buf.replace(findStr,repStr)
  
  print filePath
  fileCounter += 1
  
  os.remove(filePath)
  writeFile(filePath, str(bufnew))
 

def walk_func(dummy, dirs, files):
 global findStr, repStr
 for file in files:
  if str(dirs).find('.svn') == -1 and os.path.isfile(dirs+'/'+file)\
  and file.find('.htm') == -1:
   replaceStringInFile(findStr,repStr,dirs+'/'+file)


def main():
 global findStr, repStr, fileCounter
 
 targetDir = sys.argv[1]
 findStr   = sys.argv[2]
 #findStr   = ''
 repStr    = sys.argv[3]
 #repStr    = ''

 os.path.walk(targetDir, walk_func, 0)
 print 'Total: ', fileCounter


if __name__ == "__main__":
   main()