Google-code-prettify Example

By Xah Lee. Date:

Following is prettified code using google-code-prettify. Note that botched the line of regex that parses url. (the line as displayed is missing some 60 chars) Also, it damages the HTML code for the whole page, for example, the navigation link “∑ Back to google-code-prettify Tutorial.” at the bottom no longer works.

# -*- coding: utf-8 -*-
# Python

# find and replace in a dir by multiple pairs of regex

import os, sys,shutil,re

mydir= '/Users/xah/some'

findreplace = [

(re.compile(ur'''<a href="http://(?P<urlpart>(?:[^.]+\.)?wikipedia.org[^"]+)">http://([\w\.]+)+/(\w+/)+(?P<title>[^<]+)</a>''',re.U|re.M),
ur'''<a href="http://\g<urlpart>">\g<title>↗</a>'''), # wikipedia

# more regex pairs here
]


def replaceStringInFile(filePath):
   "replaces all string by a regex substitution"
   backupName=filePath+'~re~'

   print 'reading:', filePath
   input = open(filePath,'rb')
   s=unicode(input.read(),'utf-8')
   input.close()

   numRep=None
   for couple in findreplace:
      if numRep == None:
         numRep = re.search(couple[0],s)
      outtext = re.sub(couple[0],couple[1], s)
      s=outtext

   if numRep:
      print ' writing:', filePath
      shutil.copy2(filePath,backupName)
      outF = open(filePath,'r+b')
      outF.read() # we do this way to preserve file creation date
      outF.seek(0)
      outF.write(outtext.encode('utf-8'))
      outF.truncate()
      outF.close()

def myfun(dummy, curdir, filess):
   for child in filess:
      if re.search(r'.+\.html$',child,re.U) and os.path.isfile(curdir+'/'+child):
         replaceStringInFile(curdir+'/'+child)

os.path.walk(mydir, myfun, 3)