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Brute-force string generation in Python (optimized for printable characters only)
#!/usr/bin/env python
# -*- coding: utf-8 -*-
# Brute-force string generation
# Copyright (C) 2011 Radek Pazdera
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import string
ALLOWED_CHARACTERS = string.printable
NUMBER_OF_CHARACTERS = len(ALLOWED_CHARACTERS)
def characterToIndex(char):
return ALLOWED_CHARACTERS.index(char)
def indexToCharacter(index):
if NUMBER_OF_CHARACTERS <= index:
raise ValueError("Index out of range.")
else:
return ALLOWED_CHARACTERS[index]
def next(string):
""" Get next sequence of characters.
Treats characters as numbers (0-255). Function tries to increment
character at the first position. If it fails, new character is
added to the back of the list.
It's basically a number with base = 256.
:param string: A list of characters (can be empty).
:type string: list
:return: Next list of characters in the sequence
:rettype: list
"""
if len(string) <= 0:
string.append(indexToCharacter(0))
else:
string[0] = indexToCharacter((characterToIndex(string[0]) + 1) % NUMBER_OF_CHARACTERS)
if characterToIndex(string[0]) is 0:
return list(string[0]) + next(string[1:])
return string
def main():
sequence = list()
while True:
sequence = next(sequence)
print sequence
if __name__ == "__main__":
main()

Thank you for this script.

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