Prometheus client libaries presume a threaded model, where metrics are shared

across workers. This doesn't work so well for languages such as Python where

it's common to have processes rather than threads to handle large workloads.

- Custom collectors do not work (e.g. cpu and memory metrics)

- The pushgateway cannot be used

- Gauges cannot use the `pid` label

There's several steps to getting this working:

keywords = "prometheus monitoring instrumentation client",

url = "https://github.com/prometheus/client_python",

packages=['prometheus_client', 'prometheus_client.bridge', 'prometheus_client.twisted', 'prometheus_client.handlers'],

'twisted': ['twisted'],

},

test_suite="tests",