$ pip install exrex

$ easy_install exrex

>>> import exrex

>>> exrex.getone('(ex)r\\1')
'exrex'

>>> list(exrex.generate('((hai){2}|world!)'))
['haihai', 'world!']

>>> exrex.getone('\d{4}-\d{4}-\d{4}-[0-9]{4}')
'3096-7886-2834-5671'

>>> exrex.getone('(1[0-2]|0[1-9])(:[0-5]\d){2} (A|P)M')
'09:31:40 AM'

>>> exrex.count('[01]{0,9}')
1023

>>> print '\n'.join(exrex.generate('This is (a (code|cake|test)|an (apple|elf|output))\.'))
This is a code.
This is a cake.
This is a test.
This is an apple.
This is an elf.
This is an output.

>>> print exrex.simplify('(ab|ac|ad)')
(a[bcd])

> exrex --help
usage: exrex.py [-h] [-o FILE] [-l] [-d DELIMITER] [-v] REGEX

exrex - regular expression string generator

positional arguments:
  REGEX                 REGEX string

optional arguments:
  -h, --help            show this help message and exit
  -o FILE, --output FILE
                        Output file - default is STDOUT
  -l N, --limit N       Max limit for range size - default is 20
  -c, --count           Count matching strings
  -m N, --max-number N  Max number of strings - default is -1
  -r, --random          Returns a random string that matches to the regex
  -s, --simplify        Simplifies a regular expression
  -d DELIMITER, --delimiter DELIMITER
                        Delimiter - default is \n
  -v, --verbose         Verbose mode

$ exrex '[asdfg]'
a
s
d
f
g

$ exrex -r '(0[1-9]|1[012])-\d{2}'
09-85

$ exrex '[01]{10}' -c
1024

exrex is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

exrex 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 Affero General Public License for more details.

You should have received a copy of the GNU Affero General Public License
along with exrex. If not, see < http://www.gnu.org/licenses/ >.

(C) 2012- by Adam Tauber, <[email protected]>