scidx-streaming 0.1.3

A Python client library for interacting with the scidx POP and create streams.

scidx Streaming

A Python library for managing streaming data using the sciDX platform and a Point of Presence. This library provides easy-to-use methods for creating, consuming, and managing Kafka streams and related resources.

Table of Contents

• Installation
• Tutorial
• Running Tests
• Usage examples
• Contributing
• License
• Contact

Installation

Ensure you have Python 3.7 or higher installed. Using a virtual environment is recommended.

Option 1: Install from GitHub

1. Clone the repository:

   git clone https://github.com/sci-ndp/streaming-py.git
   cd streaming-py
   

2. Create and activate a virtual environment:

   python3 -m venv .venv
   source .venv/bin/activate
   

3. Install the package in editable mode:

   pip install -e .
   

4. Install development dependencies (optional, for testing):

   pip install -r requirements.txt
   

Option 2: Install via pip

Once the package is published on PyPI, you can install it directly using pip:

pip install scidx-streaming

Tutorial

For a step-by-step guide on how to use the streaming library, check out our comprehensive tutorial: 10 Minutes for Streaming POP Data.

Running Tests

To run the tests, navigate to the project root and execute:

pytest

Usage examples

Below is an example showcasing how to set up the library, register a data object, create a filtered stream, and consume its data.

1. Set up the POP and Streaming libraries

This can be done by initializing the APIClient and using it to initilize the StreamingClient:

from streaming import StreamingClient
from pointofpresence import APIClient

API_URL = "http://your-api-url.com"
USERNAME = "your_username"
USERNAME = "your_password"

client = APIClient(base_url=API_URL, username=USERNAME, password=PASSWORD)
streaming = StreamingClient(client)

2. Register a data object

data_object_metadata = {
    "name": "sample_data_object",
    "type": "url",
    "url": "http://example.com/data.csv",
    "description": "Sample data object for streaming demo"
}
client.register_url(data_object_metadata)

3. Create a filtered data stream

# Define filters
filters = [
    "column_name > 100",
    "IF column_name < 50 THEN alert = 'low' ELSE alert = 'high'"
]

# Create a Kafka stream with filters
stream = await streaming.create_kafka_stream(
    keywords=["sample_data_object"],
    match_all=True,
    filter_semantics=filters
)
print(f"Stream created with topic: {stream.data_stream_id}")

4. Consuming the filtered data stream

# Consume stream data
consumer = streaming.consume_kafka_messages(stream.data_stream_id)
print(consumer.dataframe.head())

5. Cleaning up

consumer.stop()
# Delete the stream and the data object
await streaming.delete_stream(stream)
client.delete_resource_by_id(search_results[0]["id"])
print("Cleanup completed.")

Contributing

Contributions are welcome! Please follow these steps:

1. Fork the repository
2. Create a new branch (git checkout -b feature/new-feature)
3. Make your changes and commit (git commit -m 'Add new feature')
4. Push to the branch (git push origin feature/new-feature)
5. Open a Pull Reques

Contributing in PyPI

To publish the library to PyPI, follow these steps:

Ensure setup.py is correctly configured.

Build the distribution files:

python setup.py sdist bdist_wheel

Upload to PyPI using twine:

twine upload dist/*

Verify the package on PyPI:

Visit https://pypi.org/ and check your package listing.

If you need to update the library on PyPI:

• Make your changes and update the version in setup.py.
• Run the above steps to rebuild and upload the new version.

License

This project is licensed under the MIT License. See LICENSE.md for more details.

Contact

For any questions or suggestions, please open an issue on GitHub.