def request_help(self, req, msg):
        """Return help on the available requests.

        Return a description of the available requests using a sequence of
        #help informs.

        Parameters
        ----------
        request : str, optional
            The name of the request to return help for (the default is to
            return help for all requests).

        Informs
        -------
        request : str
            The name of a request.
        description : str
            Documentation for the named request.

        Returns
        -------
        success : {'ok', 'fail'}
            Whether sending the help succeeded.
        informs : int
            Number of #help inform messages sent.

        Examples
        --------
        ::

            ?help
            #help halt ...description...
            #help help ...description...
            ...
            !help ok 5

            ?help halt
            #help halt ...description...
            !help ok 1

        """
        if not msg.arguments:
            for name, method in sorted(self._request_handlers.items()):
                doc = method.__doc__
                req.inform(name, doc)
            num_methods = len(self._request_handlers)
            return req.make_reply("ok", str(num_methods))
        else:
            name = msg.arguments[0]
            if name in self._request_handlers:
                method = self._request_handlers[name]
                doc = method.__doc__.strip()
                req.inform(name, doc)
                return req.make_reply("ok", "1")
            return req.make_reply("fail", "Unknown request method.")
def request_help ( self , req , msg ) : if not msg . arguments : for name , method in sorted ( self . _request_handlers . items ( ) ) : doc = method . __doc__ req . inform ( name , doc ) num_methods = len ( self . _request_handlers ) return req . make_reply ( "ok" , str ( num_methods ) ) else : name = msg . arguments [ 0 ] if name in self . _request_handlers : method = self . _request_handlers [ name ] doc = method . __doc__ . strip ( ) req . inform ( name , doc ) return req . make_reply ( "ok" , "1" ) return req . make_reply ( "fail" , "Unknown request method." )
Return help on the available requests.

        Return a description of the available requests using a sequence of
        #help informs.

        Parameters
        ----------
        request : str, optional
            The name of the request to return help for (the default is to
            return help for all requests).

        Informs
        -------
        request : str
            The name of a request.
        description : str
            Documentation for the named request.

        Returns
        -------
        success : {'ok', 'fail'}
            Whether sending the help succeeded.
        informs : int
            Number of #help inform messages sent.

        Examples
        --------
        ::

            ?help
            #help halt ...description...
            #help help ...description...
            ...
            !help ok 5

            ?help halt
            #help halt ...description...
            !help ok 1