Provide APIs to help application developers test their Histogram-using code

I have an application that uses Histogram. I want to write some tests that assert that my application is putting values into the right buckets of that histogram.

To read values out of the Histogram it seems that need to either:

• look at the Histogram's private _buckets attribute, or
• call Histogram.collectand look at the resulting Metric objects which are documented as "intended only for internal use" and then look at its Samples which aren't documented at all.

Neither of these seems particularly satisfactory. It would be very helpful if client_python provided some way to read bucket counts and the total sum from a Histogram, using documented APIs clearly marked as intended for external use (perhaps only in test suites).

Commencez par examiner l’implémentation de Histogram du client Python, en particulier son attribut _buckets et sa méthode collect, ainsi que les objets Metric et Samples qu’elle renvoie. Définissez et testez une API externe documentée permettant de lire les nombres d’éléments des buckets et la somme totale, avec une couverture montrant que les tests de l’application peuvent vérifier les valeurs sans utiliser d’objets privés ou réservés à un usage interne.