def __init__(self, master, guizero_image, update_image_callback):
self._master = master<EOL>self._guizero_image = guizero_image<EOL>self._update_image_callback = update_image_callback<EOL>self._current_frame = <NUM_LIT:0><EOL>self._running = False<EOL>self.start()<EOL>
AnimationPlayer manages the playing of a animated gif for guizero
widgets.

:param Widget master:
    The widget which is displaying the animation.

:param GUIZeroImage guizero_image:
    The image object which contains the animation.

:param function update_image_callback:
    A function which should be called when the Image needs updating.
    The function will be called and passed a reference to the next
    Tk PhotoImage object in the animation.