---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)
<ipython-input-9-78e2f3db95aa> in <module>()
      4 sns.set()
      5 df = sns.load_dataset("iris")
----> 6 sns.pairplot(df, hue="species", size=1.5)

C:\WinPython\bd35\buildQt5\winpython-32bit-3.5.x.2\python-3.5.4\lib\site-packages\seaborn\axisgrid.py in pairplot(data, hue, hue_order, palette, vars, x_vars, y_vars, kind, diag_kind, markers, size, aspect, dropna, plot_kws, diag_kws, grid_kws)
   2058     if grid.square_grid:
   2059         if diag_kind == "hist":
-> 2060             grid.map_diag(plt.hist, **diag_kws)
   2061         elif diag_kind == "kde":
   2062             diag_kws["legend"] = False

C:\WinPython\bd35\buildQt5\winpython-32bit-3.5.x.2\python-3.5.4\lib\site-packages\seaborn\axisgrid.py in map_diag(self, func, **kwargs)
   1333                     diag_ax = ax._make_twin_axes(sharex=ax,
   1334                                                  sharey=diag_axes[0],
-> 1335                                                  frameon=False)
   1336                 else:
   1337                     diag_ax = ax._make_twin_axes(sharex=ax, frameon=False)

C:\WinPython\bd35\buildQt5\winpython-32bit-3.5.x.2\python-3.5.4\lib\site-packages\matplotlib\axes\_subplots.py in _make_twin_axes(self, *kl, **kwargs)
    174         from matplotlib.projections import process_projection_requirements
    175         if 'sharex' in kwargs and 'sharey' in kwargs:
--> 176             raise ValueError("Twinned Axes may share only one axis.")
    177         kl = (self.get_subplotspec(),) + kl
    178         projection_class, kwargs, key = process_projection_requirements(

ValueError: Twinned Axes may share only one axis.