What does this function mean?

[guotong1988]

def look in https://github.com/eske/seq2seq/blob/master/translate/models.py

I see it in https://github.com/eske/seq2seq/blob/master/translate/models.py#L851
where a lot of init_var here

        initial_context, _ = look(0, initial_output, initial_input, pos=initial_pos, prev_weights=initial_weights,
                                  context=zero_context)

@Eske Thank you!!