The problem is I am using beam.ParDo to call api, to enrich my data.

 undefined

    
pipeline | "read_csv" >> beam.io.ReadFromCsv("...") 
                | "get_info_api" >> beam.ParDo(GetApiDoFN()) 
                | "write_output" >>  beam.io.WriteToBigQuery(...)

  

The problem is that api have limit. I need a way to control so it do not overload api or get 429 error.

I would like to set api call should not exceed 4 call / second.

How should I do it ?