'Enable mode on MRV uses no password.'

def enable(self, cmd=u'enable', pattern=u'#', re_flags=re.IGNORECASE):

    output = u''
    if (not self.check_enable_mode()):
        self.write_channel(self.normalize_cmd(cmd))
        output += self.read_until_prompt_or_pattern(pattern=pattern, re_flags=re_flags)
        if (not self.check_enable_mode()):
            raise ValueError(u'Failed    to    enter    enable    mode.')
    return output
