[pact-foundation]

[pact-python/4.2.0] 2026-10-23

🚀 Features

• Route Pact library and plugin logs through logging
• Initialise Pact logging from Pact and Verifier
• Set the default Pact log forwarding level
• Replace pact_ffi logger set-up with a warning
• Name Pact library loggers with dotted module paths
• Scope the Pact test run ID to each pytest test
• Add a unittest mixin for Pact logs
• Expose buffered plugin log entries
• (ffi) Build abi3t wheels for free-threaded Python

🐛 Bug Fixes

• Forward the Pact library at the level of pact.ffi alone
• Restore the pytest run ID after a unittest test case
• (ci) Tag the merged release commit
• (ci) Keep PR merge runs out of the main release group

⚡️ Performance

• Defer loading the Pact FFI until Pact is used

📚 Documentation

• Describe logging through the standard logging module
• Describe log_id during provider verification
• Describe the pytest plugin and unittest mixin
• Colour terminal output in code blocks
• Add a blog post on Pact logs in test output

🧪 Testing

• Cover Pact library log forwarding end to end
• Cover plugin log forwarding end to end
• Cover forwarding alongside an externally applied logger
• Cover the lazy attributes of pact
• Run the suites on free-threaded Python 3.15
• Import testcontainers only when starting a broker

🛠️ Miscellaneous Tasks

• (ffi) Download pact_ffi from the dist-built release
• Require pact-python-ffi 0.5.12
• (ci) Stop release runs on main being dropped

Contributors

• @JP-Ellis

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 66%. Comparing base (d52c8c7) to head (28b7651).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@         Coverage Diff          @@
##           main   #1737   +/-   ##
====================================
  Coverage    66%     66%           
====================================
  Files        23      23           
  Lines      3565    3565           
====================================
  Hits       2355    2355           
  Misses     1210    1210           

Flag	Coverage Δ
examples	39% <ø> (ø)
tests	65% <ø> (ø)

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