Metadata-Version: 2.4
Name: ptars
Version: 0.0.11rc1
Classifier: Development Status :: 4 - Beta
Classifier: License :: OSI Approved :: Apache Software License
Classifier: Natural Language :: English
Classifier: Operating System :: POSIX :: Linux
Classifier: Programming Language :: Python :: 3 :: Only
Classifier: Programming Language :: Python :: 3.10
Classifier: Programming Language :: Python :: 3.11
Classifier: Programming Language :: Python :: 3.12
Classifier: Programming Language :: Python :: 3.13
Classifier: Programming Language :: Python :: 3.14
Classifier: Programming Language :: Rust
Requires-Dist: googleapis-common-protos
Requires-Dist: protobuf
Requires-Dist: pyarrow
License-File: LICENSE
Summary: Convert from protobuf to arrow and back in rust
Keywords: apache-arrow,data,protobuf,rust
Author-email: 0x26res <0x26res@gmail.com.co>
Maintainer-email: 0x26res <0x26res@gmail.com>
License: Apache-2.0
Requires-Python: >=3.10, <4.0
Description-Content-Type: text/markdown; charset=UTF-8; variant=GFM
Project-URL: documentation, https://ptars.readthedocs.io/en/latest/
Project-URL: repository, https://github.com/0x26res/ptars

# ptars

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[Repository](https://github.com/0x26res/ptars) |
[Python Documentation](https://ptars.readthedocs.io/) |
[Python Installation](https://ptars.readthedocs.io/en/latest/getting-started/#installation) |
[PyPI](https://pypi.org/project/ptars/) |
[Rust Crate](https://crates.io/crates/ptars) |
[Rust Documentation](https://docs.rs/ptars)

Fast convertion from Protocol Buffers to Arrow, and back, using Rust, with Python bindings.

## Example

Take a protobuf:

```protobuf
message SearchRequest {
  string query = 1;
  int32 page_number = 2;
  int32 result_per_page = 3;
}
```

And convert serialized messages directly to `pyarrow.RecordBatch`:

```python
from ptars import HandlerPool


messages = [
    SearchRequest(
        query="protobuf to arrow",
        page_number=0,
        result_per_page=10,
    ),
    SearchRequest(
        query="protobuf to arrow",
        page_number=1,
        result_per_page=10,
    ),
]
payloads = [message.SerializeToString() for message in messages]

pool = HandlerPool([SearchRequest.DESCRIPTOR.file])
handler = pool.get_for_message(SearchRequest.DESCRIPTOR)
record_batch = handler.list_to_record_batch(payloads)
```

| query             |   page_number |   result_per_page |
|:------------------|--------------:|------------------:|
| protobuf to arrow |             0 |                10 |
| protobuf to arrow |             1 |                10 |

You can also convert a `pyarrow.RecordBatch` back to serialized protobuf messages:

```python
array: pa.BinaryArray = handler.record_batch_to_array(record_batch)
messages_back: list[SearchRequest] = [
    SearchRequest.FromString(s.as_py()) for s in array
]
```

## Configuration

Customize Arrow type mappings with `PtarsConfig`:

```python
from ptars import HandlerPool, PtarsConfig

config = PtarsConfig(
    timestamp_unit="us",  # microseconds instead of nanoseconds
    timestamp_tz="America/New_York",
)

pool = HandlerPool([SearchRequest.DESCRIPTOR.file], config=config)
```

## Benchmark against protarrow

[Ptars](https://github.com/0x26res/ptars) is a rust implementation of
[protarrow](https://github.com/tradewelltech/protarrow),
which is implemented in plain python.
It is:

- 2.5 times faster when converting from proto to arrow.
- 3 times faster when converting from arrow to proto.

```benchmark
---- benchmark 'to_arrow': 2 tests ----
Name (time in ms)        Mean
---------------------------------------
protarrow_to_arrow     9.4863 (2.63)
ptars_to_arrow         3.6009 (1.0)
---------------------------------------

---- benchmark 'to_proto': 2 tests -----
Name (time in ms)         Mean
----------------------------------------
protarrow_to_proto     20.8297 (3.20)
ptars_to_proto          6.5013 (1.0)
----------------------------------------
```

[pypi-image]: https://img.shields.io/pypi/v/ptars
[pypi-url]: https://pypi.org/project/ptars/
[versions-image]: https://img.shields.io/pypi/pyversions/ptars
[versions-url]: https://pypi.org/project/ptars/
[wheel-image]: https://img.shields.io/pypi/wheel/ptars
[wheel-url]: https://pypi.org/project/ptars/
[docs-image]: https://readthedocs.org/projects/ptars/badge/?version=latest
[docs-url]: https://ptars.readthedocs.io/en/latest/
[downloads-image]: https://pepy.tech/badge/ptars
[downloads-url]: https://static.pepy.tech/badge/ptars
[downloads-month-image]: https://pepy.tech/badge/ptars/month
[downloads-month-url]: https://static.pepy.tech/badge/ptars/month
[build-image]: https://github.com/0x26res/ptars/actions/workflows/ci.yaml/badge.svg
[build-url]: https://github.com/0x26res/ptars/actions/workflows/ci.yaml
[codecov-image]: https://codecov.io/gh/0x26res/ptars/branch/main/graph/badge.svg?token=XMFH27IL70
[codecov-url]: https://codecov.io/gh/0x26res/ptars
[license-image]: http://img.shields.io/:license-Apache%202-blue.svg
[license-url]: https://github.com/0x26res/ptars/blob/master/LICENSE
[ruff-image]: https://img.shields.io/endpoint?url=https://raw.githubusercontent.com/astral-sh/ruff/main/assets/badge/v2.json
[ruff-url]: https://github.com/astral-sh/ruff
[snyk-image]: https://snyk.io/advisor/python/ptars/badge.svg
[snyk-url]: https://snyk.io/advisor/python/ptars
[stars-image]: https://img.shields.io/github/stars/0x26res/ptars
[stars-url]: https://github.com/0x26res/ptars
[github-issues-image]: https://img.shields.io/badge/issue_tracking-github-blue.svg
[github-issues-url]: https://github.com/0x26res/ptars/issues
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[contributing-url]: https://github.com/0x26res/ptars/blob/main/DEVELOPMENT.md
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[crates-url]: https://crates.io/crates/ptars
[crates-downloads-image]: https://img.shields.io/crates/d/ptars
[docsrs-image]: https://docs.rs/ptars/badge.svg
[docsrs-url]: https://docs.rs/ptars
[last-commit-image]: https://img.shields.io/github/last-commit/0x26res/ptars
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[release-url]: https://github.com/0x26res/ptars/releases

