Toolz seems to have it. https://toolz.readthedocs.io/en/latest/streaming-analytics.html#split-apply-combine-with-groupby-and-reduceby https://toolz.readthedocs

Toolz seems to have it. https://toolz.readthedocs.io/en/latest/streaming-analytics.html#split-apply-combine-with-groupby-and-reduceby https://toolz.readthedocs.io/en/latest/streaming-analytics.h...