Create and bind Delta Schema structures with pyo3 for Python.

[fvaleye]

Currently, we use a JSON string for binding Rust and Python for reading the Delta table schema. The improvement is to create and use pyo3 structure in Rust for binding the Schema.

[houqp]

I am thinking of releasing a new version of the python binding, @fvaleye do you want me to wait for this before doing the release?

[fvaleye]

It's a good idea to release a new version 👍 I will take some time in the next weeks to work on it. In the mean time, the bindings for the schema will be available.

[roeap]

@fvaleye, @houqp - this is done here, so we can close this, right?

delta-rs/python/src/lib.rs

Line 74 in 5b2a09c

struct RawDeltaTableMetaData {

[houqp]

@roeap I think that's something separate. We are currently still using passing the schema from rust to python through string ser/de, see

delta-rs/python/deltalake/schema.py

Line 153 in 5b2a09c

def from_json(cls, json_data: str) -> "Schema":