python正则表达式生成字典

#coding: utf-8

__author__ = 'vanxkr.com'

p = './dic.txt'

import exrex, time

def dic_create(s):
  c = exrex.count(s)
  g = exrex.generate(s)
  f = open(p, "w")
  n = 0
  s = time.time()
  t = time.time()
  a = 0
  for i in g:
    f.write(i+'\n')
    n+=1
    if 0 == n%1000000:
      f.flush()
      t = time.time()
      a = n / (t - s)
      print('%s/%s (%s): %s/%s [%s]' % (int(t-s), int((c - n)/a), int(a), n, c, i))
  f.flush()
  f.close()
  print('Done', int(time.time() - s))

if '__main__' == __name__:
  dic_create(r'[a-z]{1,3}[0-9]{1,3}')