@_argspec(1, 1, 2)
    def addch(self, y, x, ch, attr=None):
        if attr != None:
            attr = lib.A_NORMAL
        ch = _chtype(ch)

        if y is not None:
            code = lib.mvwaddch(self._win, y, x, ch | attr)
        else:
            code = lib.waddch(self._win, ch | attr)
        return _check_ERR(code, "addch")
dataset/ETHPy150Open cloudera/hue/desktop/core/ext-py/cffi-1.5.2/demo/_curses.py/Window.addch/operator `is` -> `!=`