Please decouple average_work_mem_buffers_per_connection

Hello!
I try rewire postgresqltuner to Python.
https://github.com/patsevanton/postgrestune

And i understand long long string
https://github.com/jfcoz/postgresqltuner/blob/master/postgresqltuner.pl#L461
Could you please decouple average_work_mem_buffers_per_connection from this sting or divide this string
Thank you