cli.py 文件源码

def load_json(ctx, filename):
    if filename is None:
        if sys.stdin.isatty():
            click.echo(ctx.get_usage())
            click.echo("Try `jsoncut --help' for more information.")
            sys.exit(0)
        else:
            filename = '-'
    try:
        with click.open_file(filename) as file_:
            return json.load(file_)
    except EnvironmentError as e:
        if not sys.stdin.isatty():
            sys.stdin.read()
        click.echo(exc.default_error_mesg_fmt(e), err=True)
        sys.exit(1)
    except json.JSONDecodeError as e:
        click.echo(exc.default_error_mesg_fmt(e), err=True)
        sys.exit(1)