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https://issues.apache.org/jira/browse/ARROW-3532?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16773030#comment-16773030
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Antoine Pitrou commented on ARROW-3532:
---------------------------------------

Currently:
{code:python}
>>> ty = pa.struct([ 
...:     pa.field('a', pa.int16()), 
...:     pa.field('a', pa.float64()), 
...:     pa.field('b', pa.int32()), 
...: ]) 
...:                                                                            
                                                                                
  
>>> ty['a']                                                                     
>>>                                                                             
>>>       
Traceback (most recent call last):
  File "<ipython-input-4-3cc8818c97f5>", line 1, in <module>
    ty['a']
  File "pyarrow/types.pxi", line 276, in pyarrow.lib.StructType.__getitem__
    return self.field_by_name(i)
  File "pyarrow/types.pxi", line 254, in pyarrow.lib.StructType.field_by_name
    raise KeyError(name)
KeyError: 'a'
{code}



> [Python] Schema, StructType, StructArray field retrieval by name should raise 
> warning or exception for multiple matches
> -----------------------------------------------------------------------------------------------------------------------
>
>                 Key: ARROW-3532
>                 URL: https://issues.apache.org/jira/browse/ARROW-3532
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: Python
>            Reporter: Krisztian Szucs
>            Assignee: Antoine Pitrou
>            Priority: Major
>             Fix For: 0.13.0
>
>
> {code}
> ty = pa.struct([
>     pa.field('a', pa.int16()),
>     pa.field('a', pa.float64())
> ])
> ty['a']
> {code}



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