How Python Web Servers Work

Ever wondered how your Flask or Django app actually gets from a browser click to Python code and back? Ever have trouble deciding between Gunicorn, uWSGI, Waitress, or mod_wsgi—or what Nginx/Apache is even doing there? In this presentation, Adam Englander—a maintainer of Werkzeug, the WSGI abstraction layer behind Flask—walks through the journey from CGI to WSGI, the WSGI calling convention, and the request/response lifecycle, then shows where frameworks plug in. You’ll come away with clear mental models, practical server trade-offs, deployment and scaling tips, and a quick sense of how WSGI compares to ASGI—so you can choose wisely and debug with confidence.

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