# if it is backspace key then delete character at previous row/col
# depending on the input mode. If across editing mode, then delete
# at previous column else at previous row
elif key == "backspace":
self.delete_prev_guess ()
drawarea.queue_draw ()
# if it is backspace key then delete character at previous row/col
# depending on the input mode. If across editing mode, then delete
# at previous column else at previous row
elif key == "backspace":
self.delete_prev_guess ()
drawarea.queue_draw ()