It is possible to write to prometheus tsdb directly using java or python code？

[Lei Wang]

Promethes is using Pull Model， the prometheus server pull data from exporter/pushgateway and write to tsdb periodicly 

It is possible to write to prometheus tsdb directly using java or python code？

Thanks,

Lei 

[Brian Candler]

No.  Prometheus does not accept "push" writing of data, nor any back-filling of historical data.

If you want to do these things then have a look at some alternative projects, especially VictoriaMetrics which is strongly Prometheus-inspired.  It has the ability to ingest and backfill via a wide range of protocols and formats, and implements a superset of PromQL so you can query it just as if it were a Prometheus server.