shell.py 文件源码

def handle(self, **options):
        try:
            if options['plain']:
                # Don't bother loading IPython, because the user wants plain Python.
                raise ImportError

            self.run_shell(shell=options['interface'])
        except ImportError:
            import code
            # Set up a dictionary to serve as the environment for the shell, so
            # that tab completion works on objects that are imported at runtime.
            # See ticket 5082.
            imported_objects = {}
            try:  # Try activating rlcompleter, because it's handy.
                import readline
            except ImportError:
                pass
            else:
                # We don't have to wrap the following import in a 'try', because
                # we already know 'readline' was imported successfully.
                import rlcompleter
                readline.set_completer(rlcompleter.Completer(imported_objects).complete)
                readline.parse_and_bind("tab:complete")

            # We want to honor both $PYTHONSTARTUP and .pythonrc.py, so follow system
            # conventions and get $PYTHONSTARTUP first then .pythonrc.py.
            if not options['no_startup']:
                for pythonrc in (os.environ.get("PYTHONSTARTUP"), '~/.pythonrc.py'):
                    if not pythonrc:
                        continue
                    pythonrc = os.path.expanduser(pythonrc)
                    if not os.path.isfile(pythonrc):
                        continue
                    try:
                        with open(pythonrc) as handle:
                            exec(compile(handle.read(), pythonrc, 'exec'), imported_objects)
                    except NameError:
                        pass
            code.interact(local=imported_objects)