MAINT added early checks for dependencies for doc building

NelleV · NelleV · commit be0fb7df599a · 2017-01-14T11:38:00.000-08:00
diff --git a/doc/conf.py b/doc/conf.py
@@ -67,6 +67,13 @@
         raise ImportError("No module named mock - you need to install "
                           "mock to build the documentation")
 
+try:
+    from PIL import Image
+except ImportError:
+    raise ImportError("No module named Image - you need to install "
+                      "pillow to build the documentation")
+
+
 try:
     import matplotlib
 except ImportError:
