Seaborn pairplot not showing KDE
Looks like the problem was with statsmodels (which seaborn uses to do KDE).  I reinstalled statsmodels and that cleared up the problem.
After upgrading to matplotlib 2.0 I have a hard time getting seaborn to plot a pairplot.  For example...
sns.pairplot(df.dropna(), diag_kind='kde') returns the following error TypeError: slice indices must be integers or None or have an __index__ method.  My data doesn't have any Nans in it.  Infact, removing the kde option allows the function to run.
Any idea what is happening?