def METHOD_NAME () :
    # enable this if you want the exceptions to fall through to main.  You can
    # do this for all four cases above.
    # Note that main will only catch 'MyEx' typed exceptions.
    #
    # call_4 ()
    #
    try :
        call_4 ()
    except Exception as ex :
        e = MyEx_3 ("exception in except_3", ex)
        raise e