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From Holden Karau <hol...@pigscanfly.ca>
Subject Re: Should python-2 be supported in Spark 3.0?
Date Sat, 01 Jun 2019 00:57:55 GMT
+1

On Fri, May 31, 2019 at 5:41 PM Bryan Cutler <cutlerb@gmail.com> wrote:

> +1 and the draft sounds good
>
> On Thu, May 30, 2019, 11:32 AM Xiangrui Meng <mengxr@gmail.com> wrote:
>
>> Here is the draft announcement:
>>
>> ===
>> Plan for dropping Python 2 support
>>
>> As many of you already knew, Python core development team and many
>> utilized Python packages like Pandas and NumPy will drop Python 2 support
>> in or before 2020/01/01. Apache Spark has supported both Python 2 and 3
>> since Spark 1.4 release in 2015. However, maintaining Python 2/3
>> compatibility is an increasing burden and it essentially limits the use of
>> Python 3 features in Spark. Given the end of life (EOL) of Python 2 is
>> coming, we plan to eventually drop Python 2 support as well. The current
>> plan is as follows:
>>
>> * In the next major release in 2019, we will deprecate Python 2 support.
>> PySpark users will see a deprecation warning if Python 2 is used. We will
>> publish a migration guide for PySpark users to migrate to Python 3.
>> * We will drop Python 2 support in a future release in 2020, after Python
>> 2 EOL on 2020/01/01. PySpark users will see an error if Python 2 is used.
>> * For releases that support Python 2, e.g., Spark 2.4, their patch
>> releases will continue supporting Python 2. However, after Python 2 EOL, we
>> might not take patches that are specific to Python 2.
>> ===
>>
>> Sean helped make a pass. If it looks good, I'm going to upload it to
>> Spark website and announce it here. Let me know if you think we should do a
>> VOTE instead.
>>
>> On Thu, May 30, 2019 at 9:21 AM Xiangrui Meng <mengxr@gmail.com> wrote:
>>
>>> I created https://issues.apache.org/jira/browse/SPARK-27884 to track
>>> the work.
>>>
>>> On Thu, May 30, 2019 at 2:18 AM Felix Cheung <felixcheung_m@hotmail.com>
>>> wrote:
>>>
>>>> We don’t usually reference a future release on website
>>>>
>>>> > Spark website and state that Python 2 is deprecated in Spark 3.0
>>>>
>>>> I suspect people will then ask when is Spark 3.0 coming out then. Might
>>>> need to provide some clarity on that.
>>>>
>>>
>>> We can say the "next major release in 2019" instead of Spark 3.0. Spark
>>> 3.0 timeline certainly requires a new thread to discuss.
>>>
>>>
>>>>
>>>>
>>>> ------------------------------
>>>> *From:* Reynold Xin <rxin@databricks.com>
>>>> *Sent:* Thursday, May 30, 2019 12:59:14 AM
>>>> *To:* shane knapp
>>>> *Cc:* Erik Erlandson; Mark Hamstra; Matei Zaharia; Sean Owen; Wenchen
>>>> Fen; Xiangrui Meng; dev; user
>>>> *Subject:* Re: Should python-2 be supported in Spark 3.0?
>>>>
>>>> +1 on Xiangrui’s plan.
>>>>
>>>> On Thu, May 30, 2019 at 7:55 AM shane knapp <sknapp@berkeley.edu>
>>>> wrote:
>>>>
>>>>> I don't have a good sense of the overhead of continuing to support
>>>>>> Python 2; is it large enough to consider dropping it in Spark 3.0?
>>>>>>
>>>>>> from the build/test side, it will actually be pretty easy to continue
>>>>> support for python2.7 for spark 2.x as the feature sets won't be expanding.
>>>>>
>>>>
>>>>> that being said, i will be cracking a bottle of champagne when i can
>>>>> delete all of the ansible and anaconda configs for python2.x.  :)
>>>>>
>>>>
>>> On the development side, in a future release that drops Python 2 support
>>> we can remove code that maintains python 2/3 compatibility and start using
>>> python 3 only features, which is also quite exciting.
>>>
>>>
>>>>
>>>>> shane
>>>>> --
>>>>> Shane Knapp
>>>>> UC Berkeley EECS Research / RISELab Staff Technical Lead
>>>>> https://rise.cs.berkeley.edu
>>>>>
>>>>

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