Python Influxdb Client Query ... select series with certain topic only

Client SDKs
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1

i am trying to get data out of my database “PV_data”, measurement “mqtt_consumer” for further processing, but only data with a certain topic, e.g “only_this_topic” …

my code:

from influxdb import InfluxDBClient

dbClient = InfluxDBClient(database=‘PV_data’)
E_today = dbClient.query(‘select last(ENERGY_Today) from ‘mqtt_consumer’, topic=‘only_this_topic’ WHERE time < now()’)

what is the correct syntax for such a query?

MANY THANKS