feat(python): Support for reading delta lake tables

[chitralverma]

Allows users to read and scan delta lake tables using the eager and lazy API of polars.

Links to issue #2858

Goals

• Support different storage backends like local FS, S3 etc.
• Support of all read options that are allowed by deltalake

Examples

import polars as pl
table_path = "/path/to/delta-table/"

# `scan_delta` example
ldf = pl.scan_delta(table_path).collect()  
print(ldf)

# `read_delta` example
df = pl.read_delta(table_path, version=1)  
print(df)

Notes

• Relies on deltalake>0.6.0
• Relies on pyarrow

Checklist

• implementation for read_delta
• implementation for scan_delta
• docs
• unit tests
• examples

Signed-off-by: chitralverma chitralverma@gmail.com

[ritchie46]

This look great @chitralverma. I only have a remark about the imports other than that its great thanks a lot!

[chitralverma]

Thanks a lot @ritchie46 for accepting my first contribution to the project. 🎊

[ritchie46]

Thanks a lot @ritchie46 for accepting my first contribution to the project. 🎊

And thanks for the PR!