Increase bind zone serial by python script

fresh-zone-serial.py

#!/usr/bin/python

import os, sys
def fresh_serial(fn):
  fin = file(fn, 'r')
  lines = fin.readlines()
  fin.close()

  ols = []
  for line in lines:
    if line.find('__ZONE_SERIAL__') >= 0:
      curstr = line.split()[0]
      curo = line.find(curstr)
      newstr = '%-8d' % (int(curstr) + 1)
      oline = line[:curo] + newstr + line[curo + 8:]
      line = oline
      print 'zone %s: serial %s -> %d' % (fn, curstr, int(curstr) + 1)
    ols.append(line)

  fout = file(fn, 'w')
  fout.write(''.join(ols))
  fout.close()

if __name__ == '__main__':
  fresh_serial(sys.argv[1])
# vim:ts=2 sts=2 ai