[plotting] testing only pngs because macosx cant convert pdf to png....

GPy/plotting/matplot_dep/latent_space_visualizations/controllers/imshow_controller.py

@@ -22,8 +22,8 @@ class ImshowController(BufferedAxisChangedController):
         """
         super(ImshowController, self).__init__(ax, plot_function, plot_limits, resolution, update_lim, **kwargs)
 
-    def _init_view(self, ax, X, xmin, xmax, ymin, ymax, **kwargs):
-        return ax.imshow(X, extent=(xmin, xmax,
+    def _init_view(self, canvas, X, xmin, xmax, ymin, ymax, **kwargs):
+        return pl.imshow(canvas, X, extent=(xmin, xmax,
                                     ymin, ymax),
                          vmin=X.min(),
                          vmax=X.max(),

GPy/plotting/matplot_dep/plot_definitions.py

@@ -161,13 +161,19 @@ class MatplotlibPlots(AbstractPlottingLibrary):
         where = kwargs.pop('where') if 'where' in kwargs else None
         # pop interpolate, which we actually do not do here!
         if 'interpolate' in kwargs: kwargs.pop('interpolate')
+
+        from itertools import tee
+        try:
+            from itertools import izip as zip
+        except ImportError:
+            # python 3 already is izip
+            pass
         
-        from itertools import tee, izip
         def pairwise(iterable):
             "s -> (s0,s1), (s1,s2), (s2, s3), ..."
             a, b = tee(iterable)
             next(b, None)
-            return izip(a, b)            
+            return zip(a, b)            
             
         polycol = []
         for y1, y2 in pairwise(percentiles):