Hi Dian, I think it's better to bring up the VOTE for this proposal. Then push this forward.:)
Thanks, Jincheng Timo Walther <twal...@apache.org> 于2019年10月10日周四 下午8:07写道： > I also heard from other companies that upgrading to Python 3 is in > progress for data teams. > > +1 for simplifying the code base with option 1). > > Thanks, > Timo > > On 08.10.19 16:34, Dian Fu wrote: > > Hi everyone, > > > > I would like to propose to drop Python 2 support(Currently Python 2.7, > 3.5, 3.6, 3.7 are all supported in Flink) as it's coming to an end at Jan > 1, 2020 [1]. A lot of projects [2][3][4] has already stated or are planning > to drop Python 2 support. > > > > The benefits of dropping Python 2 support are: > > 1. Maintaining Python 2/3 compatibility is a burden and it makes the > code complicate as Python 2 and Python 3 is not compatible. > > 2. There are many features which are only available in Python 3.x such > as Type Hints[5]. We can only make use of this kind of features after > dropping the Python 2 support. > > 3. Flink-python depends on third-part projects, such as Apache Beam (may > add more dependencies such as pandas, etc in the near future), it's not > possible to upgrade them to the latest version once they drop the Python 2 > support. > > > > Here are the options we have: > > 1. Drop Python 2 support in 1.10: > > As flink-python module is a new module added since 1.9.0 and so dropping > Python 2 support at the early stage seems a good choice for us. > > 2. Deprecate Python 2 in 1.10 and drop its support in 1.11: > > As 1.10 is planned to be released around the beginning of 2020. This is > also aligned with the official Python 2 support. > > > > Personally I prefer option 1 as flink-python is new module and there is > no much history reasons to consider. > > > > Looking forward to your feedback! > > > > Regards, > > Dian > > > > [1] https://pythonclock.org/ <https://pythonclock.org/> > > [2] https://python3statement.org/ <https://python3statement.org/> > > [3] > https://spark.apache.org/news/plan-for-dropping-python-2-support.html < > https://spark.apache.org/news/plan-for-dropping-python-2-support.html> > > [4] > https://lists.apache.org/thread.html/eba6caa58ea79a7ecbc8560d1c680a366b44c531d96ce5c699d41535@%3Cdev.beam.apache.org%3E > < > https://lists.apache.org/thread.html/eba6caa58ea79a7ecbc8560d1c680a366b44c531d96ce5c699d41535@%3Cdev.beam.apache.org%3E > > > > [5] > https://stackoverflow.com/questions/32557920/what-are-type-hints-in-python-3-5 > < > https://stackoverflow.com/questions/32557920/what-are-type-hints-in-python-3-5 > > > > >
