added pytest.mark.flaky for test_big_query_write_temp_table_append_sc… (

#31364)

* added pytest.mark.flaky for test_big_query_write_temp_table_append_schema_update

* updated the version

* only run flaky when it is available

* switched to tenacity

* fixed the isort

sdks/python/apache_beam/io/gcp/bigquery_write_it_test.py

@@ -34,6 +34,8 @@
 import pytz
 from parameterized import param
 from parameterized import parameterized
+from tenacity import retry
+from tenacity import stop_after_attempt
 
 import apache_beam as beam
 from apache_beam.io.gcp.bigquery import BigQueryWriteFn
@@ -457,7 +459,7 @@ def test_big_query_write_insert_errors_reporting(self):
   @pytest.mark.it_postcommit
   def test_big_query_write_insert_non_transient_api_call_error(self):
     """
-    Test that non-transient GoogleAPICallError errors returned 
+    Test that non-transient GoogleAPICallError errors returned
     by beam.io.WriteToBigQuery are not retried and result in
     FAILED_ROWS containing both the failed rows and the reason
     for failure.
@@ -504,6 +506,7 @@ def test_big_query_write_insert_non_transient_api_call_error(self):
           equal_to(bq_result_errors))
 
   @pytest.mark.it_postcommit
+  @retry(reraise=True, stop=stop_after_attempt(3))
   @parameterized.expand([
       param(file_format=FileFormat.AVRO),
       param(file_format=FileFormat.JSON),