py_metric_support

Prometheus metric helper.

Install

pip install -e .

Or with requirements files:

pip install -r requirements.txt
pip install -r requirements-dev.txt

Usage

from py_metric_support import Measure, MetricSupport

MetricSupport.counter("requests_total", ("path", "/health")).inc()
MetricSupport.gauge("workers").set(4)
MetricSupport.gauge_on_scrape("build_info", "version", callback=lambda: Measure(1, "0.1.0"))
MetricSupport.summary("request_latency_seconds", ("path", "/health"), quantiles=[0.5, (0.95, 0.01)]).observe(0.123)

print(MetricSupport.to_prometheus())
print(MetricSupport.to_json_string())

quantiles= accepts either raw ranks like 0.5 or (rank, precision) pairs like (0.95, 0.01). When quantiles are requested, py_metric_support uses the prometheus-summary backend because the official Python Prometheus client exports _sum and _count only.