Cloudflare Officially Launches Python Workers... Supporting FastAPI, Django, and AI Pipeline Construction

Cloudflare has officially launched Python Workers (GA). This signifies that Python is now recognized as a fully supported first-class language on the Cloudflare Developer Platform, allowing existing Python code and libraries to connect directly with Cloudflare platform services such as Workers AI, R2, and D1.

Key Features and Technical Improvements

• Native Binding Support: The Workers runtime and Python SDK encapsulate type conversions, allowing all Cloudflare bindings to be used in a Pythonic manner without explicit conversion to TypeScript objects.
• Web Framework Compatibility: Supports all frameworks using WSGI/ASGI interfaces, including FastAPI, Django, and Flask. Global scaling is possible without server configuration via the workers.asgi and workers.wsgi packages.
• Database Integration: Can integrate with PostgreSQL and MySQL via Hyperdrive. The previous issue of unsupported TCP sockets has been resolved by implementing custom socket syscalls based on the Workers connect API.

AI Agent and Ecosystem Expansion

• AI Library Support: AI libraries that use HTTP clients, such as openai, langchain, and mcp, run natively. The networking stack is fully functional due to the combination of JS fetch API routing and low-level socket support.
• Package Ecosystem: PEP 783 has been adopted to resolve WebAssembly compilation issues for packages containing C/C++/Rust native extensions. PyEmscripten platform support has been added to the Pyodide build toolchain and cibuildwheel.
• Practical Examples: Examples of asynchronous AI orchestration pipelines using Queue, Workflows, and R2, as well as real-time stream processing using Durable Objects, are provided.