shell.py 文件源码

def python(self, options):
        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.
        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)
            # Enable tab completion on systems using libedit (e.g. macOS).
            # These lines are copied from Lib/site.py on Python 3.4.
            readline_doc = getattr(readline, '__doc__', '')
            if readline_doc is not None and 'libedit' in readline_doc:
                readline.parse_and_bind("bind ^I rl_complete")
            else:
                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 OrderedSet([os.environ.get("PYTHONSTARTUP"), os.path.expanduser('~/.pythonrc.py')]):
                if not pythonrc:
                    continue
                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)