Tkinter.py 文件源码

def report_callback_exception(self, exc, val, tb):
        """Report callback exception on sys.stderr.

        Applications may want to override this internal function, and
        should when sys.stderr is None."""
        import traceback, sys
        print >>sys.stderr, "Exception in Tkinter callback"
        sys.last_type = exc
        sys.last_value = val
        sys.last_traceback = tb
        traceback.print_exception(exc, val, tb)