Source code for demo

#!/usr/bin/env python

__docformat__ = 'restructuredtext en'

from string import ascii_letters, digits

table = ascii_letters + digits + '-'


[docs]def is_valid_host(machine='&truc'): """Check machine. A machine must start with an ascii_letter >>> is_valid_host('azerty') True >>> is_valid_host('Qwerty') True >>> is_valid_host('&azerty') False A machine can only contain chararcters present in table table == ascii_letters + digits + '-' >>> table 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-' >>> is_valid_host('azerty-0123456789-QWERTY') True >>> is_valid_host('azerty-0123456789-&-QWERTY') False """ if machine[0] not in ascii_letters: return False else: bad_characters = [character for character in machine[1:] if character not in table] return not bad_characters
if __name__ == "__main__": import doctest OPTIONS = doctest.REPORT_ONLY_FIRST_FAILURE | doctest.ELLIPSIS |\ doctest.NORMALIZE_WHITESPACE doctest.testmod(verbose=True, optionflags=OPTIONS) # vim:set et sts=4 ts=4 tw=80:

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