[jira] [Commented] (SPARK-6902) Row() object can be mutated even though it should be immutable

["Davies Liu (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-6902?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14546274#comment-14546274 ] 

Davies Liu commented on SPARK-6902:
-----------------------------------

[~jarfa] Python is a dynamic language, it's not common to provide read-only interface (there are many ways to break it), so I'd like to leave it as current (won't fix). Does this work for you?

> Row() object can be mutated even though it should be immutable
> --------------------------------------------------------------
>
>                 Key: SPARK-6902
>                 URL: https://issues.apache.org/jira/browse/SPARK-6902
>             Project: Spark
>          Issue Type: Bug
>          Components: PySpark, SQL
>    Affects Versions: 1.2.0
>            Reporter: Jonathan Arfa
>            Assignee: Davies Liu
>
> See the below code snippet, IMHO it shouldn't let you assign {{x.c = 5}} and should just give you an error.
> {quote}
> Welcome to
>       ____              __
>      / __/__  ___ _____/ /__
>     _\ \/ _ \/ _ `/ __/  '_/
>    /__ / .__/\_,_/_/ /_/\_\   version 1.2.0-SNAPSHOT
>       /_/
> Using Python version 2.6.6 (r266:84292, Jan 22 2014 09:42:36)
> SparkContext available as sc.
> >>> from pyspark.sql import *
> >>> x = Row(a=1, b=2, c=3)
> >>> x
> Row(a=1, b=2, c=3)
> >>> x.__dict__
> \{'__FIELDS__': ['a', 'b', 'c']\}
> >>> x.c
> 3
> >>> x.c = 5
> >>> x
> Row(a=1, b=2, c=3)
> >>> x.__dict__
> \{'__FIELDS__': ['a', 'b', 'c'], 'c': 5\}
> >>> x.c
> 5
> {quote}



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