subclassing collections.Counter

[Ian Kelly]

On Tue, Dec 15, 2015 at 8:49 AM, Pavlos Parissis
<pavlos.parissis at gmail.com> wrote:
> Hi,
>
> I need to store values for metrics and return the average for some
> and the sum for the rest. Thus, I thought I could extend
> collections.Counter class by returning averages for some keys.

Leave Counter out of it, as this is not what it's designed for. Write
a custom Metrics class, with each attribute being a pseudo-collection
that maintains a sum or average.