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Convert from protobuf to arrow and back

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# Protarrow

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**Protarrow** is a python library for converting from Protocol Buffers to Apache Arrow and back.

It is used at [Tradewell Technologies](https://www.tradewelltech.co/),
to share data between transactional and analytical applications,
with little boilerplate code and zero data loss.

## Installation

```shell
pip install protarrow
```

## Usage

Taking a simple protobuf:

```protobuf
message MyProto {
  string name = 1;
  int32 id = 2;
  repeated int32 values = 3;
}
```

It can be converted to a `pyarrow.Table`:

```python
import protarrow

my_protos = [
    MyProto(name="foo", id=1, values=[1, 2, 4]),
    MyProto(name="bar", id=2, values=[3, 4, 5]),
]

table = protarrow.messages_to_table(my_protos, MyProto)
```

| name   |   id | values   |
|:-------|-----:|:---------|
| foo    |    1 | [1 2 4]  |
| bar    |    2 | [3 4 5]  |

And the table can be converted back to proto:

```python
protos_from_table = protarrow.table_to_messages(table, MyProto)
```

See the [documentation](https://protarrow.readthedocs.io/en/latest/)

[pypi-image]: https://img.shields.io/pypi/v/protarrow
[pypi-url]: https://pypi.org/project/protarrow/
[conda-image]: https://img.shields.io/conda/vn/conda-forge/protarrow.svg
[conda-url]: https://prefix.dev/channels/conda-forge/packages/protarrow
[build-image]: https://github.com/tradewelltech/protarrow/actions/workflows/ci.yaml/badge.svg
[build-url]: https://github.com/tradewelltech/protarrow/actions/workflows/ci.yaml
[stars-image]: https://img.shields.io/github/stars/tradewelltech/protarrow
[stars-url]: https://github.com/tradewelltech/protarrow
[versions-image]: https://img.shields.io/pypi/pyversions/protarrow
[versions-url]: https://pypi.org/project/protarrow/
[doc-image]: https://readthedocs.org/projects/protarrow/badge/?version=latest
[doc-url]: https://protarrow.readthedocs.io/en/latest/?badge=latest
[license-image]: http://img.shields.io/:license-Apache%202-blue.svg
[license-url]: https://github.com/tradewelltech/protarrow/blob/master/LICENSE
[codecov-image]: https://codecov.io/gh/tradewelltech/protarrow/branch/master/graph/badge.svg?token=XMFH27IL70
[codecov-url]: https://codecov.io/gh/tradewelltech/protarrow
[downloads-image]: https://pepy.tech/badge/protarrow
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[downloads-month-image]: https://pepy.tech/badge/protarrow/month
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[downloads-conda-image]: https://img.shields.io/conda/dn/conda-forge/protarrow.svg?label=Conda%20downloads
[downloads-conda-url]: https://anaconda.org/conda-forge/protarrow
[codestyle-image]: https://img.shields.io/badge/code%20style-black-000000.svg
[codestyle-url]: https://github.com/ambv/black
[snyk-image]: https://snyk.io/advisor/python/protarrow/badge.svg
[snyk-url]: https://snyk.io/advisor/python/protarrow
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[contributing-url]: https://protarrow.readthedocs.io/en/latest/contributing/
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[python-url]: https://www.python.org/
[repo-size-url]: https://github.com/tradewelltech/protarrow
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protarrow

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