Apache Beam 2.11.0 is the first release that offers partial support for Python 3. As of 2.11.0, only Python 3.5 on Direct and Dataflow runners has been sufficiently tested, and Python 3 support remains an active work in progress. Current goal is to extend Beam codebase compatibility with Python 3.6, 3.7, address known issues and increase test coverage.
Contributions are welcome! If you are interested to help, you can select an unassigned issue in the Kanban board and assign it to yourself. Comment on the issue if you cannot assign it yourself. When submitting a new PR, please tag @aaltay, @fredo838, @Juta, and @tvalentyn.