Select criteria via longitude/latitude and also use depart_line/arrival_line. So you can get transfer station's list through some criteria in depart->arrival path way. I gave +- 0.05 penalty to longitude/latitude. because we can choose bypass route.
get_transfercriteria(depart, depart_line, arrival, arrival_line)
get_transfercriteria(depart="먹골", depart_line="7", arrival="혜화", arrival_line="4")
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