aioquic

aioquic is a pure-Python library for the QUIC network protocol and HTTP/3, featuring a minimal TLS 1.3 implementation. It follows a 'bring your own I/O' (sans-I/O) design, making it suitable for embedding in various frameworks. As of version 1.3.0, it supports QUIC v1 (RFC 9000), QUIC v2 (RFC 9369), and HTTP/3 (RFC 9114). The library is actively maintained with frequent updates and is regularly tested for interoperability against other QUIC implementations.