def xview_scroll(self, *L):
        # change by frank gao for attach scrollbar 11/11/2010
        """Shift the view in the window left or right according to number and
        what. The 'number' parameter must be an integer. The 'what' parameter
        must be either units or pages or an abbreviation of one of these.

        If 'what' is units, the view adjusts left or right by number cells on
        the display; if it is pages then the view adjusts by number screenfuls.
        If 'number' is negative then cells farther to the left become visible;
        if it is positive then cells farther to the right become visible. """
        #self.tk.call(self._w, 'xview', 'scroll', number, what)
        op, howMany = L[0],L[1]
        if op != 'scroll':
            units = L[2]
            self.tk.call(self._w, 'xview', 'scroll', howMany, units)
        elif op == 'moveto':
                 self.tk.call(self._w, 'xview', 'moveto', howMany)
dataset/ETHPy150Open Arelle/Arelle/arelle/TkTableWrapper.py/Table.xview_scroll/operator `==` -> `!=`