simpleplugin.py 文件源码

def debug_exception(logger=None):
    """
    Diagnostic helper context manager

    It controls execution within its context and writes extended
    diagnostic info to the Kodi log if an unhandled exception
    happens within the context. The info includes the following items:

    - Module path.
    - Code fragment where the exception has happened.
    - Global variables.
    - Local variables.

    After logging the diagnostic info the exception is re-raised.

    Example::

        with debug_exception():
            # Some risky code
            raise RuntimeError('Fatal error!')

    :param logger: logger function which must accept a single argument
        which is a log message. By default it is :func:`xbmc.log`
        with ``ERROR`` level.
    """
    try:
        yield
    except:
        if logger is None:
            logger = lambda msg: xbmc.log(msg, xbmc.LOGERROR)
        logger('Unhandled exception detected!')
        logger('*** Start diagnostic info ***')
        frame_info = inspect.trace(5)[-1]
        logger('File: {0}'.format(frame_info[1]))
        context = ''
        for i, line in enumerate(frame_info[4], frame_info[2] - frame_info[5]):
            if i == frame_info[2]:
                context += '{0}:>{1}'.format(str(i).rjust(5), line)
            else:
                context += '{0}: {1}'.format(str(i).rjust(5), line)
        logger('Code context:\n' + context)
        logger('Global variables:\n' + _format_vars(frame_info[0].f_globals))
        logger('Local variables:\n' + _format_vars(frame_info[0].f_locals))
        logger('**** End diagnostic info ****')
        raise