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francois-blanchardJoris Van den Bossche
81ce081a43d
francois-blanchard authored and Joris Van den Bossche committed dbe708c7527
ARROW-7087: [Python] Metadata disappear from pandas dataset

Related to [ARROW-7087](https://issues.apache.org/jira/browse/ARROW-7087)

There is an unexpected behavior when we write a table from pandas dataset which contains metadata. They are replaced by pandas metadata.

Therefore, I concatenated schema metadata and pandas metadata before return the schema.

Closes #6127 from francois-blanchard/ARROW-7087_metadata_disappear_from_pandas and squashes the following commits:

99e558f31 <francois-blanchard> ARROW-7087:  Table Metadata disappear when we write a partitioned dataset

Authored-by: francois-blanchard <francois.blanchard@tinyclues.com>
Signed-off-by: Joris Van den Bossche <jorisvandenbossche@gmail.com>