Counter

Counters go up, and reset when the process restarts.

from prometheus_client import Counter c = Counter('my_failures', 'Description of counter') c.inc() # Increment by 1 c.inc(1.6) # Increment by given value 

If there is a suffix of _total on the metric name, it will be removed. When exposing the time series for counter, a _total suffix will be added. This is for compatibility between OpenMetrics and the Prometheus text format, as OpenMetrics requires the _total suffix.

There are utilities to count exceptions raised:

@c.count_exceptions() def f():  pass  with c.count_exceptions():  pass  # Count only one type of exception with c.count_exceptions(ValueError):  pass