#!/usr/bin/env python
"""Module to generate a random string

Attributes:
    LENGTH (int): Defaults to a length of 16
"""

import sys
import optparse
import os
import base64

LENGTH = 16


def generate(length):
    """Simple function to call OpenSSL

    Args:
        length (int): length of string to return
    """
    return base64.encodestring(os.urandom(256))[:length]


def main():
    """Main function to call
    """
    parser = optparse.OptionParser()
    parser.add_option('-n', dest='length', default=LENGTH, type=int)
    opts, _ = parser.parse_args()

    print generate(opts.length)


if __name__ == '__main__':
    main()
    sys.exit(0)