[jira] [Created] (ARROW-15870) [Python] Start to raise deprecation warnings when using use_legacy_dataset=True in parquet.py

[Joris Van den Bossche (Jira)]

Joris Van den Bossche created ARROW-15870:
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             Summary: [Python] Start to raise deprecation warnings when using 
use_legacy_dataset=True in parquet.py
                 Key: ARROW-15870
                 URL: https://issues.apache.org/jira/browse/ARROW-15870
             Project: Apache Arrow
          Issue Type: Improvement
          Components: Python
            Reporter: Joris Van den Bossche
             Fix For: 8.0.0


Currently, users can still specify {{use_legacy_dataset=True}} explicitly to 
get the old implementation/behaviour. But if we want to remove that 
implementation at some point (ARROW-15868), we should start deprecating that 
option, to futher nudge people to the new implementation.



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