dev/changelog/50.0.0.md

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# Apache DataFusion Python 50.0.0 Changelog

This release consists of 12 commits from 7 contributors. See credits at the end of this changelog for more information.

**Implemented enhancements:**

- feat: allow passing a slice to and expression with the [] indexing [#1215](https://github.com/apache/datafusion-python/pull/1215) (timsaucer)

**Documentation updates:**

- docs: fix CaseBuilder documentation example [#1225](https://github.com/apache/datafusion-python/pull/1225) (IndexSeek)
- docs: update link to user example for custom table provider [#1224](https://github.com/apache/datafusion-python/pull/1224) (IndexSeek)
- docs: add apache iceberg as datafusion data source [#1240](https://github.com/apache/datafusion-python/pull/1240) (kevinjqliu)

**Other:**

- 49.0.0 release [#1211](https://github.com/apache/datafusion-python/pull/1211) (timsaucer)
- Update development guide in README.md [#1213](https://github.com/apache/datafusion-python/pull/1213) (YKoustubhRao)
- Add benchmark script and documentation for maximizing CPU usage in DataFusion Python [#1216](https://github.com/apache/datafusion-python/pull/1216) (kosiew)
- Fixing a few Typos [#1220](https://github.com/apache/datafusion-python/pull/1220) (ntjohnson1)
- Set fail on warning for documentation generation [#1218](https://github.com/apache/datafusion-python/pull/1218) (timsaucer)
- chore: remove redundant error transformation [#1232](https://github.com/apache/datafusion-python/pull/1232) (mesejo)
- Support string column identifiers for sort/aggregate/window and stricter Expr validation [#1221](https://github.com/apache/datafusion-python/pull/1221) (kosiew)
- Prepare for DF50 [#1231](https://github.com/apache/datafusion-python/pull/1231) (timsaucer)

## Credits

Thank you to everyone who contributed to this release. Here is a breakdown of commits (PRs merged) per contributor.

```
     4	Tim Saucer
     2	Tyler White
     2	kosiew
     1	Daniel Mesejo
     1	Kevin Liu
     1	Koustubh Rao
     1	Nick
```

Thank you also to everyone who contributed in other ways such as filing issues, reviewing PRs, and providing feedback on this release.