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From "Chesnay Schepler (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-4795) CsvStringify crashes in case of tuple in tuple, t.e. ("a", True, (1,5))
Date Tue, 11 Oct 2016 06:53:20 GMT

    [ https://issues.apache.org/jira/browse/FLINK-4795?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15564695#comment-15564695
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Chesnay Schepler commented on FLINK-4795:
-----------------------------------------

Thank you for reporting this. As a general remark it is always helpful to include the error
message you got.

You are correct that _map should be called instead.

read_csv not supporting nested tuples is intended to be consistent with the java & scala
counterparts.

> CsvStringify crashes in case of tuple in tuple, t.e. ("a", True, (1,5))
> -----------------------------------------------------------------------
>
>                 Key: FLINK-4795
>                 URL: https://issues.apache.org/jira/browse/FLINK-4795
>             Project: Flink
>          Issue Type: Bug
>          Components: Python API
>            Reporter: Yakov Goldberg
>
> CsvStringify crashes in case of tuple in tuple, t.e. ("a", True, (1,5))
> Looks like, mistyping in CsvStringify._map()
> def _map(self, value): 
>         if isinstance(value, (tuple, list)): 
>             return "(" + b", ".join([self.map(x) for x in value]) + ")" 
>         else: 
>             return str(value) 
> self._map() should be called
> But this will affect write_csv() and read_csv().
> write_csv() will work automatically
> and read_csv() should be implemented to be able to read Tuple type.



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