What's Changed

• Expose measured duration on Timer context manager by @vokracko in #1166
• Use specific exception for duplicate timeseries by @kajinamit in #1074
• Make clear() a no-op for label-less metrics (fixes #707) by @ompathakbaap in #1184
• Use object instead of Any for labels() parameters by @gregoiredx in #1186
• Add TLS version parameters for start_wsgi_server by @vyzigold in #1178
• Validate Enum arguments before registering the collector by @sean-kim05 in #1189
• Do not emit a leading zero in floatToGoString exponents >= 10 by @sean-kim05 in #1190
• fix: make test suite pass on Windows and Python 3.12+ by @MelvinjoseC in #1185
• Parse the native histogram sum as a float by @sean-kim05 in #1192
• Remove nameless collectors from the registry on unregister by @sean-kim05 in #1191
• Fix operator precedence allowing exemplars on any metric type by @sean-kim05 in #1188

New Contributors

• @vokracko made their first contribution in #1166
• @ompathakbaap made their first contribution in #1183
• @gregoiredx made their first contribution in #1186
• @vyzigold made their first contribution in #1178
• @sean-kim05 made their first contribution in #1189
• @MelvinjoseC made their first contribution in #1185

Full Changelog: v0.25.0...v0.26.0

What's Changed

• Fix spaces in grouping key values for push_to_gateway by @veeceey in #1156
• Support MultiProcessCollector in RestrictedRegistry by @mathias-kende in #1150

Full Changelog: v0.24.1...v0.25.0

• [Django] Pass correct registry to MultiProcessCollector by @jelly in #1152

What's Changed

• Add an AIOHTTP exporter by @Lexicality in #1139
• Add remove_matching() method for metric label deletion by @hazel-shen in #1121
• fix(multiprocess): avoid double-building child metric names (#1035) by @hazel-shen in #1146
• Don't interleave histogram metrics in multi-process collector by @cjwatson in #1148
• Relax registry type annotations for exposition by @cjwatson in #1149
• Added compression support in pushgateway by @ritesh-avesha in #1144
• Add Django exporter (#1088) by @Chadys in #1143

Full Changelog: v0.23.1...v0.24.0

What's Changed

• fix: use tuples instead of packaging Version by @efiop in #1136

New Contributors

• @efiop made their first contribution in #1136

Full Changelog: v0.23.0...v0.23.1

What's Changed

• UTF-8 Content Negotiation by @ywwg in #1102
• Re include test data by @mgorny in #1113
• Improve parser performance by @csmarchbanks in #1117
• Add support to write_to_textfile for custom tmpdir by @aadityadhruv in #1115
• OM text exposition for NH by @vesari in #1087
• Fix bug which caused metric publishing to not accept query string parameters in ASGI app by @hacksparr0w in #1125
• Emit native histograms only when OM 2.0.0 is requested by @vesari in #1128
• fix: remove space after comma in openmetrics exposition by @theSuess in #1132
• Fix issue parsing double spaces after # HELP/# TYPE by @csmarchbanks in #1134

New Contributors

• @mgorny made their first contribution in #1113
• @aadityadhruv made their first contribution in #1115
• @hacksparr0w made their first contribution in #1125
• @theSuess made their first contribution in #1132

Full Changelog: v0.22.1...v0.23.0

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