def coerce(cls, string):
        """Create a :class:`Requirement` object from a given package spec."""
        match = re.match(cls.spec_regex, string)
        if not match:
            raise InvalidRequirementSpecError("could not parse requirement")
        package = match.group(1)
        if all(match.group(2, 3)):
            version = "".join(match.group(2, 3))
        else:
            version = None
        return cls(package, version)
def loginSsh(self):
        self._setupLog()
        self._debugLog("Login in as "+self._loginUser.username)

        try:
            self._loginUser.sendPassword()
            return True
        except Exception as e:
            self.forceCloseCliConnectionTo()
            raise Exception('Exception ('+str(e)+') '+'Expected CLI response: "Password:"' + "\n Got: \n" + self._lastExpect())