Add basic statistics function

[mrocklin]

This does very little, but it's an example of what we could do.

[rjzamora]

Cool!

I experimented with this in dask.dataframe in the past and ended up wanting partition-wise statistics to do things more complicated than optimizing len (i.e. row-count, and column min/max/null_count).

[mrocklin]

and ended up wanting partition-wise statistics to do things more complicated than optimizing

Yup. I agree. I added length just because that was trivial to do in a few minutes. I hope that we start to track more sophisticated metadata.

My hope is that you give this some thought and it becomes something that we keep in mind.

[rjzamora]

Yup. I agree. I added length just because that was trivial to do in a few minutes... My hope is that you give this some thought and it becomes something that we keep in mind.

Got it. This was my assumption - Thanks for confirming.