bitstrength_random.py

def generate_random_string(bit_strength=64, decimal=False):
    """
    Generates a random ASCII-encoded unsigned integral random number in decimal
    or hexadecimal representation.

    :param bit_strength:
        Bit strength.
    :returns:
        A string representation of a randomly-generated ASCII-encoded
        hexadecimal/decimal-representation unsigned integral number
        based on the bit strength specified.
    """
    if bit_strength % 8 or bit_strength <= 0:
        raise ValueError("This function expects a bit strength: got `%r`." % (bit_strength, ))
    length = bit_strength / 8
    value = binascii.b2a_hex(os.urandom(length))
    if decimal:
        value = bytes(int(value, 16))
    return value