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

bug

Status: Open.

#1177 In prometheus/client_python;

· 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

Status: Open.

#1176 In prometheus/client_python;

· calestyo opened on May 14, 2026

_lock not found on metric

bug

Status: Open.

Bug

#1140 In prometheus/client_python;

· zack-littke-smith-ai opened on Oct 1, 2025

WSL and MultiProcessCollector

Status: Open.

#1126 In prometheus/client_python;

· kschroeder opened on Aug 29, 2025

Metric without labelnames causes issues in when MULTIPROC is enabled

Status: Open.

#1123 In prometheus/client_python;

· gg-mmill opened on Aug 28, 2025

Allow native histograms emission only when OM 2.0 is requested

Status: Open.

#1122 In prometheus/client_python;

· vesari opened on Aug 22, 2025

CPU performance is degraded on version 0.22.1

Status: Open.

#1114 In prometheus/client_python;

· osd42 opened on Jun 17, 2025

Unbundle the decorator dependency, or at least upgrade it

Status: Open.

#1107 In prometheus/client_python;

· Romain-Geissler-1A opened on May 16, 2025

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

Status: Open.

#1105 In prometheus/client_python;

· Apich238 opened on Apr 30, 2025

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

Status: Open.

#1092 In prometheus/client_python;

· calestyo opened on Feb 21, 2025

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

Status: Open.

#1091 In prometheus/client_python;

· n-peugnet opened on Feb 14, 2025

Multiproc doesn't capture all metrics

Status: Open.

#1089 In prometheus/client_python;

· matt0x6F opened on Feb 12, 2025