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 <xwei...@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 <xwei...@ucsc.edu
> <mailto:xwei...@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
