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https://issues.apache.org/jira/browse/AIRFLOW-1558?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ash Berlin-Taylor closed AIRFLOW-1558.
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Resolution: Duplicate
> S3FileTransformOperator fails in Python 3 due to file mode
> ----------------------------------------------------------
>
> Key: AIRFLOW-1558
> URL: https://issues.apache.org/jira/browse/AIRFLOW-1558
> Project: Apache Airflow
> Issue Type: Bug
> Components: operators
> Affects Versions: 1.8.0
> Environment: python3
> Reporter: Adam Wentz
> Priority: Minor
>
> When running under python3 the S3FileTransformOperator fails with the
> following error:
> {noformat}
> [2017-09-01 18:44:54,440] {models.py:1427} ERROR - write() argument must be
> str, not bytes
> [2017-09-01 18:44:54,443] {base_task_runner.py:95} INFO - Subtask: Traceback
> (most recent call last):
> [2017-09-01 18:44:54,444] {base_task_runner.py:95} INFO - Subtask: File
> "/usr/local/lib/python3.6/site-packages/airflow/models.py", line 1384, in run
> [2017-09-01 18:44:54,445] {base_task_runner.py:95} INFO - Subtask: result
> = task_copy.execute(context=context)
> [2017-09-01 18:44:54,445] {base_task_runner.py:95} INFO - Subtask: File
> "/usr/local/lib/python3.6/site-packages/airflow/operators/s3_file_transform_operator.py",
> line 87, in execute
> [2017-09-01 18:44:54,446] {base_task_runner.py:95} INFO - Subtask:
> source_s3_key_object.get_contents_to_file(f_source)
> [2017-09-01 18:44:54,446] {base_task_runner.py:95} INFO - Subtask: File
> "/usr/local/airflow/.local/lib/python3.6/site-packages/boto/s3/key.py", line
> 1662, in get_contents_to_file
> [2017-09-01 18:44:54,447] {base_task_runner.py:95} INFO - Subtask:
> response_headers=response_headers)
> [2017-09-01 18:44:54,447] {base_task_runner.py:95} INFO - Subtask: File
> "/usr/local/airflow/.local/lib/python3.6/site-packages/boto/s3/key.py", line
> 1494, in get_file
> [2017-09-01 18:44:54,447] {base_task_runner.py:95} INFO - Subtask:
> query_args=None)
> [2017-09-01 18:44:54,448] {base_task_runner.py:95} INFO - Subtask: File
> "/usr/local/airflow/.local/lib/python3.6/site-packages/boto/s3/key.py", line
> 1548, in _get_file_internal
> [2017-09-01 18:44:54,448] {base_task_runner.py:95} INFO - Subtask:
> fp.write(bytes)
> [2017-09-01 18:44:54,448] {base_task_runner.py:95} INFO - Subtask: File
> "/usr/local/lib/python3.6/tempfile.py", line 483, in func_wrapper
> [2017-09-01 18:44:54,449] {base_task_runner.py:95} INFO - Subtask: return
> func(*args, **kwargs)
> [2017-09-01 18:44:54,449] {base_task_runner.py:95} INFO - Subtask: TypeError:
> write() argument must be str, not bytes
> [2017-09-01 18:44:54,450] {base_task_runner.py:95} INFO - Subtask:
> [2017-09-01 18:44:54,443] {models.py:1451} INFO - Marking task as FAILED.
> {noformat}
> The solution is to open the `NamedTemporaryFile`s with mode `wb` rather than
> `w`. PR: https://github.com/apache/incubator-airflow/pull/2559
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