Python sed

sed.py

#!/usr/bin/env python
# -*- coding: latin1 -*-

import os
import sys
import re

FILENAME = sys.argv[1]

def main():
  f = open(FILENAME)
  contents = ''
  for line in f:
    line = line.replace('', '')
    line = line.replace('document.createElement("CANVAS")', 'new TRWebchart_Shared.SharedUtilityFuncs().createCanvas()');
    contents += line
  f.close()
  f = open(FILENAME, 'w')
  f.write(contents)
  f.close()

if __name__ == '__main__':
  main()