Issues

• Support OpenMetrics 2.0 exposition format

  prometheus/client_python#1210 · Filter by author rbizos opened on Sep 23, 2026

• MultiProcessCollector fails permanently on an empty metrics file left by a killed worker

  prometheus/client_python#1199 · Filter by author dom111 opened on Aug 12, 2026

• OpenMetrics content negotiation: escaping=underscores causes name mismatch between HELP/TYPE metadata and sample lines for metrics with colons

  bug
  prometheus/client_python#1177 · Filter by author nabil-dbz opened on May 15, 2026

• feature request/RFC: leave out a label (from at least *MetricFamily samples) when it's value is set to None

  prometheus/client_python#1176 · Filter by author calestyo opened on May 14, 2026

• WSL and MultiProcessCollector

  prometheus/client_python#1126 · Filter by author kschroeder opened on Aug 29, 2025
  2

• Metric without labelnames causes issues in when MULTIPROC is enabled

  prometheus/client_python#1123 · Filter by author gg-mmill opened on Aug 28, 2025

• Allow native histograms emission only when OM 2.0 is requested

  prometheus/client_python#1122 · Filter by author vesari opened on Aug 22, 2025
  

• CPU performance is degraded on version 0.22.1

  prometheus/client_python#1114 · Filter by author osd42 opened on Jun 17, 2025
  7

• Unbundle the decorator dependency, or at least upgrade it

  prometheus/client_python#1107 · Filter by author Romain-Geissler-1A opened on May 16, 2025

• [Question] Why isn't MultiProcessCollector a subclass of Collector?

  prometheus/client_python#1105 · Filter by author Apich238 opened on Apr 30, 2025

• should the project/package name be prometheus-client rather than prometheus_client

  prometheus/client_python#1092 · Filter by author calestyo opened on Feb 21, 2025
  4

• OpenMetrics parser cannot parse the output of promtool tsdb dump-openmetrics

  prometheus/client_python#1091 · Filter by author n-peugnet opened on Feb 14, 2025

• Multiproc doesn't capture all metrics

  prometheus/client_python#1089 · Filter by author matt0x6F opened on Feb 12, 2025
  5

• Feature request - public registry._names_to_collectors access

  prometheus/client_python#1071 · Filter by author Lancetnik opened on Nov 15, 2024
  5

• Async CustomCollector

  prometheus/client_python#1069 · Filter by author takeda opened on Oct 31, 2024
  3

• Error: TypeError: expected str, bytes or os.PathLike object, not NoneType

  prometheus/client_python#1061 · Filter by author paulocoutinhox opened on Oct 10, 2024

• Allow to return str instead bytes from generate_latest()

  prometheus/client_python#1060 · Filter by author stalkerg opened on Oct 9, 2024
  2

• Collect metrics on scrape instead of timer

  prometheus/client_python#1059 · Filter by author nonamethanks opened on Oct 3, 2024
  1

• No file is created in the assigned multiprocess directory

  prometheus/client_python#1058 · Filter by author tiagoborzino opened on Oct 2, 2024

• MultiProcessCollector._accumulate_metrics always drops timestamps

  prometheus/client_python#1056 · Filter by author roganartu opened on Aug 19, 2024
  1

• Remove gauge metric

  prometheus/client_python#1055 · Filter by author danielstankw opened on Aug 7, 2024
  7

• InfoMetricFamily’s add_metric() parameters are strangely named and should provide default values

  prometheus/client_python#1049 · Filter by author calestyo opened on Jul 11, 2024
  1

• namespace (and subsystem) for *MetricFamily classes

  prometheus/client_python#1048 · Filter by author calestyo opened on Jul 11, 2024

• would be nice if Info.info() accepted non-str types in the given dict

  prometheus/client_python#1046 · Filter by author calestyo opened on Jul 5, 2024
  1

• add complete documentation

  prometheus/client_python#1045 · Filter by author calestyo opened on Jul 4, 2024
  12