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Posted to issues@spark.apache.org by "Hyukjin Kwon (Jira)" <ji...@apache.org> on 2020/07/28 03:23:00 UTC
[jira] [Commented] (SPARK-32423) class 'DataFrame' returns instance
of type(self) instead of DataFrame
[ https://issues.apache.org/jira/browse/SPARK-32423?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17166114#comment-17166114 ]
Hyukjin Kwon commented on SPARK-32423:
--------------------------------------
Can you show some pseudo codes? It's a bit difficult to follow what the JIRA targets.
> class 'DataFrame' returns instance of type(self) instead of DataFrame
> ----------------------------------------------------------------------
>
> Key: SPARK-32423
> URL: https://issues.apache.org/jira/browse/SPARK-32423
> Project: Spark
> Issue Type: Wish
> Components: PySpark
> Affects Versions: 2.4.6, 3.0.0
> Reporter: Timothy
> Priority: Minor
>
> To allow for appropriate child classing of DataFrame, I propose the following change:
> class 'DataFrame' returns instance of type(self) instead of typeDataFrame
>
> Therefore child classes using methods such as '.limit()' will return an instance of the child class.
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