pyversion.py 文件源码

def format_exception(exc_info, encoding='UTF-8'):
    ec, ev, tb = exc_info

    # Our exception object may have been turned into a string, and Python 3's
    # traceback.format_exception() doesn't take kindly to that (it expects an
    # actual exception object).  So we work around it, by doing the work
    # ourselves if ev is not an exception object.
    if not is_base_exception(ev):
        tb_data = force_unicode(
                ''.join(traceback.format_tb(tb)),
                encoding)
        ev = exc_to_unicode(ev)
        return tb_data + ev
    else:
        return force_unicode(
                ''.join(traceback.format_exception(*exc_info)),
                encoding)