Check row.magazines.length
Check row.magazines.length

Updating python documentation per @neumino request
https://github.com/rethinkdb/docs/pull/397#issuecomment-47954597
rust-rethinkdb/reql,rust-rethinkdb/reql,rust-rethinkdb/reql,rust-rethinkdb/reql,rust-rethinkdb/reql,rust-rethinkdb/reql