auto2to3.py 文件源码

def main():
    parser = argparse.ArgumentParser()
    parser.add_argument('--package', action='append')
    parser.add_argument('--dir', action='append')
    parser.add_argument('-m', action='store', metavar='MODULE')
    args, rest = parser.parse_known_args()
    if args.package:
        PACKAGES.extend(args.package)
    if args.dir:
        DIRS.extend(os.path.abspath(d) for d in args.dir)
    if not PACKAGES and not DIRS:
        DIRS.append(os.getcwd())
    if args.m:
        sys.argv[1:] = rest
        runpy.run_module(args.m, run_name='__main__', alter_sys=True)
    elif rest:
        sys.argv = rest
        converted = maybe_2to3(rest[0])
        with open(converted) as f:
            new_globals = dict(__name__='__main__',
                               __file__=rest[0])
            exec(f.read(), new_globals)
    else:
        import code
        code.interact()