def trust_asset( systemdb, source_name, asset_name, asset_source_name): q = Query() s_sk = systemdb.search(q.name == source_name)[0]['sk'] a_pk = systemdb.search(q.name == asset_source_name)[0]['pk'] b = Builder(secret = s_sk, network='TESTNET') b.append_change_trust_op(asset_name, a_pk, '1000000') b.sign() response = b.submit() print response