Scrambler v1.0

#! /usr/bin/env python
# coding:utf-8

import itertools
import codecs
import sys

try:
    import argparse
except:
    print 'In order to use this program, please install python-argparse package!'
    sys.exit()

#Setting argument parser and help messages
argpar = argparse.ArgumentParser(description='Scrambler v1.0 is a string permutation tool that gets all words of the same letters, and/or providing all possibilities! It also filters the output using a text-based dictionary! It support UTF-8; most languages are supported including Arabic!',
                                epilog='Scrambler v1.0 by Mohammed A. Mustafa <Anxious.Nut@Gmail.com>')
argpar.add_argument('--word','-w', metavar='Input', dest='input', default=None, help='User input, the source word that gets scrambled!')
argpar.add_argument('--raw','-r', metavar='True', dest='raw', nargs='?', default=False, help='Data output, output will not be filtered with a dictionary; every combination will be printed if this option is added!')
argpar.add_argument('-d', metavar='Location', dest='dict', default='/usr/share/dict/words', help='Location of an optional dictionary that will be used for filtering the output; defaults to Linux English dictionary, /usr/share/dict/words!')
argpar.add_argument('--output','-o', metavar='File', dest='output', default=None, help='Saves the output in a UTF-8 text file at the specified location!')
args = argpar.parse_args()

#Loading dictionary
if args.raw != True:
    try:
        opener = codecs.open(args.dict,'r','utf-8')
    except:
        print 'Error: Dictionary at {0} is not available!'.format(args.dict)
        sys.exit()
    try:
        words_raw = opener.read()
        words = words_raw.splitlines()
        opener.close()
    except:
        print 'Error: Failed to read dictionary!'
        sys.exit()

#Getting input from user
if args.input != None:
    word = args.input
else:
    try:
        word = raw_input('Enter a word: ')
    except:
        print '\nError: Noting was entered; exiting!'
        sys.exit()

#Permuting
try:
    perms = list(itertools.permutations(list(word.decode('utf-8'))))
except:
    print '\nError: Permutation failed or canceled! Please report this error if this is encountered continually!'
    sys.exit()

#Filtering with/without loaded dictionary
matching = []
if args.raw == False: #w/o dictionary
    try:
        for match in perms:
            if (u''.join(match) in words) and (u''.join(match) not in matching):
               matching.append(u''.join(match))
    except:
        print '\nError: Script failed!'
        sys.exit()
else: #w/ dictionary
    for match in perms:
        try: matching.append(u''.join(match))
        except:
            print '\nError: Script failed!'
            sys.exit()

#Providing output for user
if len(matching) != 0 and (args.output == None):
    print u'\n'.join(matching)
elif len(matching) != 0 and (args.output != None):
    try:
        op = codecs.open(args.output,'w','utf-8')
        op.write(u'\n'.join(matching))
        op.close()
    except:
        print 'Error: File at {0} is not accessible!'.format(args.output)
else:
    print 'None matched!'

################################ Scrambler v1.0 ################################
# Written by: Mohammed A. Mustafa (AnxiousNut)
# Email: <Anxious.Nut@Gmail.com>
# Blog: http://AnxiousNut.wordpress.com
# License: GPLv3 http://www.gnu.org/licenses/gpl-3.0.html
################################################################################