def set(self, item, column=None, value=None):
        """Query or set the value of given item.

        With one argument, return a dictionary of column/value pairs
        for the specified item. With two arguments, return the current
        value of the specified column. With three arguments, set the
        value of given column in given item to the specified value."""
        res = self.tk.call(self._w, "set", item, column, value)
        if column != None and value is None:
            return _splitdict(self.tk, res,
                              cut_minus=False, conv=_tclobj_to_py)
        else:
            return res
dataset/ETHPy150Open francelabs/datafari/windows/python/Lib/lib-tk/ttk.py/Treeview.set/operator `is` -> `!=`