arrow-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Aaron Chu <xwei...@ucsc.edu>
Subject Re: PyArrow.Table schema.metadata issue
Date Sat, 30 Nov 2019 05:02:21 GMT
Thanks Maarten,

It works. You're really helpfull. Thanks again.

Best Regards,
Aaron Chu


On Wed, Nov 27, 2019 at 10:18 PM Maarten Ballintijn <maartenb@xs4all.nl>
wrote:

> Hi Aaron,
>
> The schema is immutable, add_metadata returns a new schema object which
> includes the metadata.
> So I think this does what you want:
>
> schema = schema.add_metadata(meta)
>
> If not, experts will chime in hopefully.
>
> Cheers,
> Maarten.
>
>
>
> On Nov 28, 2019, at 12:41 AM, Aaron Chu <xweichu@ucsc.edu> wrote:
>
> Dear all,
>
> I need your help regarding the pyarrow.table.schema.
>
> I tried to create a schema and use with_metadata/add_metadata functions to
> add the metadata (a python dict) to the schema. However, nothing showed up
> when I run 'schema.metadata'. I can't get the metadata added to the schema.
>
> This issue can be easily reproduced on python2 and 3:
>
> import pyarrow as pa
> schema = pa.schema([pa.field('Event_ID', pa.int64())])
> meta = {}
> meta['test'] = 'testval'
> schema.add_metadata(meta)
> #schema.with_metadata(meta)
> schema.metadata
>
> Thanks for your help!!
>
> Best Regards,
> Aaron Chu
>
>
> On Wed, Nov 27, 2019 at 9:37 PM Aaron Chu <xweichu@ucsc.edu> wrote:
>
>> Dear all,
>>
>> I need your help regarding the pyarrow.table.schema.
>>
>> I tried to create a schema and use with_metadata/add_metadata functions
>> to add the metadata (a python dict) to the schema. However, nothing showed
>> up when I run 'schema.metadata'. I can't get the metadata added to the
>> schema.
>>
>> This issue can be easily reproduced on python2 and 3:
>>
>> import pyarrow as pa
>> schema = pa.schema([pa.field('Event_ID', pa.int64())])
>> meta = {}
>> meta['test'] = 'testval'
>> schema.add_metadata(meta)
>> #schema.with_metadata(meta)
>> schema.metadata
>>
>> Thanks for your help!!
>>
>> Best Regards,
>> Aaron Chu
>>
>
>

Mime
View raw message