def _tabsubst(self, *args):
        if len(args) is not len(self._tabsubst_format):
            return args

        tk = self.tk
        c, C, i, r, s, S, W = args
        e = tkinter.Event()

        e.widget = self
        e.c = tk.getint(c)
        e.i = tk.getint(i)
        e.r = tk.getint(r)
        e.C = "%d,%d" % (e.r, e.c)
        e.s = s
        e.S = S
        try:
            e.W = self._nametowidget(W)
        except KeyError:
            e.W = None

        return (e,)
dataset/ETHPy150Open Arelle/Arelle/arelle/TkTableWrapper.py/Table._tabsubst/operator `!=` -> `is not`