def register (self, cmd):
        """Register a new command with the tool. 'cmd' is expected to be an instance
        of `Command`, although here only the `cmd.name` attribute is
        investigated. Multiple commands with the same name are not allowed to
        be registered. Returns 'self'.

        """
        if cmd.name is None:
            raise ValueError ('no name set for Command object %r' % cmd)
        if cmd.name in self.commands:
            raise ValueError ('a command named "%s" has already been '
                              'registered' % cmd.name)

        self.commands[cmd.name] = cmd
        return self
def register ( self , cmd ) : if cmd . name is None : raise ValueError ( 'no name set for Command object %r' % cmd ) if cmd . name in self . commands : raise ValueError ( 'a command named "%s" has already been ' 'registered' % cmd . name ) self . commands [ cmd . name ] = cmd return self
Register a new command with the tool. 'cmd' is expected to be an instance
        of `Command`, although here only the `cmd.name` attribute is
        investigated. Multiple commands with the same name are not allowed to
        be registered. Returns 'self'.