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Python Intermediate

What is Uvicorn?

A lightning-fast ASGI server for Python, commonly used to serve FastAPI and other async web applications.

Uvicorn is an ASGI (Asynchronous Server Gateway Interface) server implementation using uvloop and httptools for high performance. It serves modern async Python frameworks like FastAPI, Starlette, and Django (async views). Uvicorn supports HTTP/1.1, WebSockets, and can handle thousands of concurrent connections efficiently. In production, it is typically run behind Gunicorn using Uvicorn workers (gunicorn -k uvicorn.workers.UvicornWorker) for process management and graceful restarts. Configuration includes host/port binding, SSL certificates, log levels, and worker count. It replaces WSGI servers like Gunicorn's default worker for async applications.

Related Terms

Comprehension
A concise syntax pattern for creating collections by transforming and filtering items from iterables.
FastAPI
A modern, high-performance Python web framework for building APIs with automatic OpenAPI documentation and type validation.
Generator
A function that yields values one at a time using the yield keyword, enabling memory-efficient iteration over large datasets.
Python Profiling
Measuring where Python code spends time and memory to identify performance bottlenecks and optimization opportunities.
Python Descriptors
Objects that define __get__, __set__, or __delete__ methods, controlling how attribute access works on other objects.
Python Interpreter
The program that reads and executes Python code, translating it into machine instructions at runtime.
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