XD-DENG commented on issue #5469: [AIRFLOW-4842] Add Py2 deprecation notice URL: https://github.com/apache/airflow/pull/5469#issuecomment-505302977 Observe error ``` 51) ERROR: Failure: SyntaxError (invalid syntax (branch_operator.py, line 51)) ---------------------------------------------------------------------- Traceback (most recent call last): .tox/py27-backend_mysql-env_docker/lib/python2.7/site-packages/nose/loader.py line 418 in loadTestsFromName addr.filename, addr.module) .tox/py27-backend_mysql-env_docker/lib/python2.7/site-packages/nose/importer.py line 47 in importFromPath return self.importFromDir(dir_path, fqname) .tox/py27-backend_mysql-env_docker/lib/python2.7/site-packages/nose/importer.py line 94 in importFromDir mod = load_module(part_fqname, fh, filename, desc) tests/operators/test_branch_operator.py line 25 in <module> from airflow.operators.branch_operator import BaseBranchOperator SyntaxError: invalid syntax (branch_operator.py, line 51) ``` Only Py2 tests failed, and caused by this line: https://github.com/apache/airflow/blob/v1-10-test/airflow/operators/branch_operator.py#L51 ```python def execute(self, context: Dict): ```
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