py-radix

py-radix is a Python library that implements the radix tree (also known as a Patricia tree) data structure, primarily for efficient storage and retrieval of IPv4 and IPv6 network prefixes. This structure is commonly used for routing table lookups due to its ability to efficiently store prefixes of varying lengths and perform fast lookups of containing networks. The library is actively maintained, with version 1.1.0 released in late 2025, and consistently supports recent Python versions.