Google-code-prettify Example

Xah Lee, 2009-06-20

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, ⁖ 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)