urllib3

urllib3 is a powerful, user-friendly HTTP client library for Python providing thread-safe connection pooling, client-side TLS/SSL verification, multipart file uploads, retry helpers, redirect handling, and support for gzip, deflate, brotli, and zstd content encoding. Current stable version is 2.6.3 (released 2025). The project follows an active release cadence with security patches, minor feature releases, and occasional major versions; the 2.x line requires Python >=3.9 and OpenSSL >=1.1.1.