How do I reset the prometheus internal state?

[PhilipMay]

I have a module that uses prometheus to expose some metrics.
Then I have a pytest module that tests that first module with mutiple test functions.

Between the test functions the state of the prometheus client is not reset.
But I want to have a "clean and new" state for every single test function.
As the state was when the Python runtime started.

My question: How can I clean / reset / delete the state of the prometheus client?

Many thanks
Philip

[csmarchbanks]

Ideally you would be able to use a custom registry in your module rather than the default registry, e.g. registry=my_registry. This can also be helpful for users of your module who may not want all of the default collectors.

There is also an unregister function on the registry that you can use to iterate across all of the registered metrics that you would like to reset and unregister them.