Function shift_frames

rl2/a3c/worker.py:48–49

(state, next_frame)

# Throw out the oldest frame
# And concatenate the newest frame
def shift_frames(state, next_frame):
  return np.append(state[:,:,1:], np.expand_dims(next_frame, 2), axis=2)


# Make a Tensorflow op to copy weights from one scope to another