[Bug]: Python SDK chain after WriteToBigQuery example is incorrect for file_loads method

[tangsiwei0831]

What happened?

In

beam/sdks/python/apache_beam/io/gcp/bigquery.py

Line 286 in 611676d

return (result.load_jobid_pairs, result.copy_jobid_pairs) | beam.Flatten()

, the documentation states that the chain operation for file loads is
return (result.load_jobid_pairs, result.copy_jobid_pairs) | beam.Flatten()

In fact, according to

beam/sdks/python/apache_beam/io/gcp/bigquery.py

Line 2230 in 611676d

destination_load_jobid_pairs=output[

and

beam/sdks/python/apache_beam/io/gcp/bigquery.py

Line 2234 in 611676d

destination_copy_jobid_pairs=output[

, it should be
return (result.destination_load_jobid_pairs, result.destination_copy_jobid_pairs) | beam.Flatten()

Issue Priority

Priority: 3 (minor)

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