def perform_no_ops(ale, no_op_max, preprocess_stack, seq):
#perform nullops
for _ in range(np.random.randint(1, no_op_max + 1)):
ale.act(0)
preprocess_stack.append(ale.getScreenRGB())
if len(preprocess_stack) < 2:
ale.act(0)
preprocess_stack.append(ale.getScreenRGB())
seq.append(pp.preprocess(preprocess_stack[0], preprocess_stack[1]))
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