Create a Password Dictionary Generating Script - Python

import itertools
import argparse

parser = argparse.ArgumentParser()
parser.add_argument("chars", help="The possible password characters")
parser.add_argument("-m", "--min", help="The minimum length of the password")
parser.add_argument("-M", "--max", help="The maximum length of the password")
parser.add_argument("-o", "--output", help="Filename to save output generated")

#you will notice something weird (action="store_true") that just means the programs shouldn't expect any value from it
group_parser = parser.add_mutually_exclusive_group()
group_parser.add_argument("-R", "--repeat", help="If you want some of the characters to repeat", action="store_true")
group_parser.add_argument("-r", "--noreapeat", help="If you don't want any of the characters to repeat", action="store_true")

args = parser.parse_args()

if args.norepeat:
    if args.min and args.max:
        if args.output:
            f = open(args.output, "w")
            for i in range(args.min, args.max):
                res = itertools.permutations(args.chars, i)
                for j in res:
                    f.write(''.join(j) + "\n")

            f.close()

        else:
             for i in range(args.min, args.max):
                  res = itertools.permutations(args.chars, i)
                  for j in res:
                      print ''.join(j)

    else:
        if args.output:
            f = open(args.output, "w")
            for i in range(5, 10):
                res = itertools.permutations(args.chars, i)
                for j in res:
                    f.write(''.join(j) + "\n")

            f.close()

        else:
             for i in range(5, 10):
                  res = itertools.permutations(args.chars, i)
                  for j in res:
                      print ''.join(j)

elif args.repeat:
      if args.min and args.max:
        if args.output:
            f = open(args.output, "w")
            for i in range(args.min, args.max):
                res = itertools.product(args.chars, repeat=i)
                for j in res:
                    f.write(''.join(j) + "\n")

            f.close()

        else:
             for i in range(args.min, args.max):
                  res = itertools.product(args.chars, repeat=i)
                  for j in res:
                      print ''.join(j)

      else:
        if args.output:
            f = open(args.output, "w")
            for i in range(5, 10):
                res = itertools.product(args.chars, repeat=i)
                for j in res:
                    f.write(''.join(j) + "\n")

            f.close()

        else:
             for i in range(5, 10):
                  res = itertools.product(args.chars, repeat=i)
                  for j in res:
                      print ''.join(j)


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