def _add_keybind_callbacks(self):
    'Bind keys'
    self.animation.viewer.bind_key('Alt-f', self._capture_keyframe_callback)
    self.animation.viewer.bind_key('Alt-r', self._replace_keyframe_callback)
    self.animation.viewer.bind_key('Alt-d', self._delete_keyframe_callback)
    self.animation.viewer.bind_key('Alt-a', self._key_adv_frame)
    self.animation.viewer.bind_key('Alt-b', self._key_back_frame)
Bind keys
def _add_keybind_callbacks(self):
    
    self.animation.viewer.bind_key('Alt-f', self._capture_keyframe_callback)
    self.animation.viewer.bind_key('Alt-r', self._replace_keyframe_callback)
    self.animation.viewer.bind_key('Alt-d', self._delete_keyframe_callback)
    self.animation.viewer.bind_key('Alt-a', self._key_adv_frame)
    self.animation.viewer.bind_key('Alt-b', self._key_back_frame)