PY3 fix. Can’t index a .keys() view.

Author: theengineear

plotly/tools.py

@@ -3282,7 +3282,7 @@ def get_color_dict(self, colorscale):
                 'rgb(255,220,0)']  # yellow
 
         for i in range(len(default_colors.keys())):
-            k = default_colors.keys()[i]
+            k = list(default_colors.keys())[i]  # PY3 won't index keys
             if i < len(colorscale):
                 default_colors[k] = colorscale[i]