The resampler interprets zeros as `None`

[llucax]

What happened?

The resampler is interpreting zeros as None. This breaks the average calculation and also, in extreme cases, when a stream of zeros long enough come, the resampler will start producing Nones instead.

What did you expect instead?

Interpret zeros as zeros

Affected version(s)

v0.22.0+

Affected part(s)

Data pipeline (part:data-pipeline)

Extra information

This bug was introduced when Quantity was added, specifically by:

• 63d7c92#diff-64982d7c164bb9baee028a55a89678a9cd2f9e476e474fcb1bbe36ceddbf8f5bR729

And it is first present in:

• https://github.com/frequenz-floss/frequenz-sdk-python/releases/tag/v0.22.0