Polars parquet #417

[swapdewalkar]

Polars Parquet Data Saver /Loader.
Implement https://pola-rs.github.io/polars/py-polars/html/reference/io.html#parquet as a data saver/loader.

Changes

• Parquet Wrapper
• Unit tests
• Materialize Example

How I tested this

I ran unit tests.

Notes

Checklist

• PR has an informative and human-readable title (this will be pulled into the release notes)
• Changes are limited to a single goal (no scope creep)
• Code passed the pre-commit check & code is left cleaner/nicer than when first encountered.
• Any change in functionality is tested
• New functions are documented (with a description, list of inputs, and expected output)
• Placeholder code is flagged / future TODOs are captured in comments
• Project documentation has been updated if adding/changing functionality.

[skrawcz]

storage_options: dict[str, Any] = None

E TypeError: 'type' object is not subscriptable

For python 3.7 -- dict[str, Any] isn't valid. Instead it should be Dict[str, Any].

[swapdewalkar]

For Issue #417

[skrawcz]

almost there

[swapdewalkar]

@skrawcz update take a look once!

[skrawcz]

Looks good -- just need to remove references to things we don't need yet.