password.py 文件源码

def _random_password(length=DEFAULT_LENGTH, chars=C.DEFAULT_PASSWORD_CHARS):
    '''Return a random password string of length containing only chars

    :kwarg length: The number of characters in the new password.  Defaults to 20.
    :kwarg chars: The characters to choose from.  The default is all ascii
        letters, ascii digits, and these symbols ``.,:-_``

    .. note: this was moved from the old ansible utils code, as nothing
        else appeared to use it.
    '''
    assert isinstance(chars, text_type), '%s (%s) is not a text_type' % (chars, type(chars))

    random_generator = random.SystemRandom()

    password = []
    while len(password) < length:
        new_char = random_generator.choice(chars)
        password.append(new_char)

    return u''.join(password)