This example demonstrates the basic usage of the Replane Python SDK with the asynchronous client.

• Python 3.10 or higher
• A running Replane server
• An SDK key from your Replane dashboard

1. Create a virtual environment:

python -m venv venv
source venv/bin/activate  # On Windows: venv\Scripts\activate

1. Install dependencies:

pip install -r requirements.txt

1. Update configuration in main.py:

BASE_URL = "https://your-replane-server.com"
SDK_KEY = "your_sdk_key_here"

python main.py

• Using the AsyncReplane with async context manager
• Reading feature flags and configs (sync read from local cache)
• Passing context for override evaluation
• Using default values for missing configs
• Manual async client lifecycle
• Subscribing to config changes (sync and async callbacks)
• Real-time config updates

The get() method is intentionally synchronous even in the async client because it only reads from the local in-memory cache. There's no I/O involved, so there's no benefit to making it async. The SSE connection that keeps the cache updated runs in a background task.