def remove(self, elem):
        """Remove a requirement.

        :param elem: a string or :class:`Requirement` instance.
        """
        if isinstance(elem, text_type):
            for requirement in self:
                if requirement.package == elem:
                    return super(Requirements, self).remove(requirement)
        return super(Requirements, self).remove(elem)
def __init__(self, host, loginUser, debug = False, trace = False, log=None, port=22, pexpectObject=None):
        self.pexpect = pexpect if not pexpectObject else pexpectObject
        self.debug = debug
        self.trace = trace
        self.host = host
        self._port = port
        self._connection = None
        self.modeList = []
        self._log = log
        self._bufferedCommands = None
        self._bufferedMode = None
        self._loginUser = loginUser
        self._resetExpect()