What's Changed

• BugFix: Skip validating and parsing comment lines early (#1108) by @wissamir in #1109
• Use License Expressions in pyproject.toml by @csmarchbanks in #1111

Full Changelog: v0.22.0...v0.22.1

What's Changed

• Add support for native histograms in OM parser by @vesari in #1040
• Add exemplar support to CounterMetricFamily [Fix #1062] by @lod in #1063
• Fix write_to_textfile leaves back temp files on errors by @ethanschen in #1066
• Support UTF-8 in metric creation, parsing, and exposition by @ywwg in #1070
• Fix incorrect use of reentrant locks by @suligap in #1076
• Remove Python 3.8 support by @kajinamit in #1075
• Check if labelvalues is in _metrics before deletion in MetricWrapperBase.remove() by @GlorifiedPig in #1077
• Add support for Python 3.13 by @Pliner in #1080
• Correct nh sample span structure and parsing by @vesari in #1082
• Migrate from setup.py to pyproject.toml by @csmarchbanks in #1084
• Changed pushgateway.md by @mallika-mur in #1083
• Fix order-dependent flaky tests related to UTF-8 support by @dg98 in #1093
• Update versions for docs Github actions by @csmarchbanks in #1096
• Documentation Updates by @ethanschen in #1097
• Add note on gauge.set_function not working with multiprocessing by @aapeliv in #1098
• Don't send an empty HTTP header for /favicon.ico by @noselasd in #1101

Full Changelog: v0.21.0...v0.22.0

What's Changed

[BUGFIX] Revert incorrect use of reentrant locks. #1076

What's Changed

[CHANGE] Reject invalid (not GET or OPTION) HTTP methods. #1019
[ENHANCEMENT] Allow writing metrics when holding a lock for the metric in the same thread. #1014
[BUGFIX] Check for and error on None label values. #1012
[BUGFIX] Fix timestamp comparison. #1038

What's Changed

• [CHANGE/BUGFIX] Update OpenMetrics Content Type to 1.0.0. #997
• [FEATURE] Enable graceful shutdown for start_{http,wsgi}_server by returning the server and thread. #999
• [FEATURE] Allow resetting counter metrics. #1005
• [BUGFIX] wsgi server: address family discovery is not quite right. #1006

What's Changed

[FEATURE] support HTTPS/TLS in start_http_server. #946
[BUGFIX] fix: error in determining timestamp less than. #979

[CHANGE] Remove support for Python versions < 3.8. #936
[FEATURE] Add mostrecent aggregation to Gauge. #967
[ENHANCEMENT] Typing improvements. #935, #970
[ENHANCEMENT] Allow enabling or disabling _created metrics from code. #973
[BUGFIX] Change #!/usr/bin/python to #!/usr/bin/env python in remaining places. #945

[BUGFIX] Use #!/usr/bin/env python instead of #!usr/bin/python in bridge/graphite.py. #928

[ENHANCEMENT] Add additional typing. #887, #903
[BUGFIX] Fix typo in python_gc_objects_collected metadata. #894
[BUGFIX] Do not include .pyc files in the build wheel. #906

[FEATURE] Support HELP text in multiprocess mode. #804
[ENHANCEMENT] Reduce the mmap minimum size. #853
[BUGFIX] Use the correct OpenMetrics encoder when application/openmetrics-text is requested in ASGI apps. #864
[BUGFIX] Allow Prometheus format parser to handle a missing space after labels. #872