I’ve been working on Python-based backend development for about three years now in various forms. I primarily use Django and FastAPI, although I initially started with Flask. However, during my backend work, I frequently encountered the terms ASGI and WSGI. For example, one of my Django deployment scripts included references to asgi_app and wsgi_app, and used gunicorn to deploy these apps. Although I initially dismissed these terms as implementation details, I now find myself needing to support both ASGI and WSGI apps for my company tensorfuse. As a result, I believe it’s important to explain ASGI and WSGI to a wider audience.