Method start

IPython/core/historyapp.py:152–161

(self)

    ))

    def start(self):
        if self.subapp is None:
            print("No subcommand specified. Must specify one of: %s" % \
                                                    (self.subcommands.keys()))
            print()
            self.print_description()
            self.print_subcommands()
            self.exit(1)
        else:
            return self.subapp.start()