def show_mouse_position(x, y): canvas.itemconfig(turtle._turtle_mask, text='x: {}, y: {}'.format(x, y))

This function updates the text displayed on the turtle canvas to show the current position of the mouse cursor. The x and y coordinates of the mouse cursor are passed as arguments to the function, and the text displayed on the turtle canvas is updated to show these coordinates. The canvas is accessed using the "canvas" variable, and the turtle object is accessed using the "turtle" variable. The "itemconfig" method is used to update the text displayed on the turtle canvas. The "format" method is used to insert the x and y coordinates into the text string.