Telnet login: can be username/password or just password.

def telnet_login(
        self,
        pri_prompt_terminator="#",
        alt_prompt_terminator=">",
        username_pattern=r"Login Name:",
        pwd_pattern=r"assword",
        delay_factor=1,
        max_loops=60,
    ):
        """Telnet login: can be username/password or just password."""
        super(HPProcurveTelnet, self).telnet_login(
            pri_prompt_terminator=pri_prompt_terminator,
            alt_prompt_terminator=alt_prompt_terminator,
            username_pattern=username_pattern,
            pwd_pattern=pwd_pattern,
            delay_factor=delay_factor,
            max_loops=max_loops,
        )