matplotlib/matplotlib — pull request #3571 by tacaswell (2014-09-27 03:10:41+00:00)
Title: BUG : deal with empty list passed to boxplot

If a data list is empty, return a dict full of np.nan.

Closes #3569 and addresses part of https://github.com/pydata/pandas/issues/8382

4th time's the charm on this commit.

Needs testing.