structlog

Structured logging for Python. Current version: 25.5.0 (Mar 2026). No level filtering by default — ALL log levels emitted until configured. structlog.configure() must be called before first use; loggers obtained before configure() use default settings. bind() is immutable — returns a new logger, does not mutate in place. structlog.contextvars.merge_contextvars needed for request-scoped context. stdlib interop requires ProcessorFormatter. _context attribute deprecated — use structlog.get_context().