BUG : patch from mikofski to fix webagg example

examples/user_interfaces/embedding_webagg.py

@@ -20,7 +20,7 @@
 import tornado.websocket
 
 
-from matplotlib.backends.backend_webagg_core import (
+from backend_webagg_core import (
     FigureManagerWebAgg, new_figure_manager_given_figure)
 from matplotlib.figure import Figure
 

lib/matplotlib/backends/backend_webagg_core.py

@@ -26,7 +26,7 @@
 from matplotlib.figure import Figure
 from matplotlib import backend_bases
 from matplotlib import _png
-
+from matplotlib import rcParams
 
 def new_figure_manager(num, *args, **kwargs):
     """
@@ -65,6 +65,18 @@ def __init__(self, *args, **kwargs):
         # sent to the clients will be a full frame.
         self._force_full = True
 
+    @classmethod
+    def get_supported_filetypes_grouped(cls):
+        """Return a dict of savefig file formats supported by this backend,
+        where the keys are a file type name, such as 'Joint Photographic
+        Experts Group', and the values are a list of filename extensions used
+        for that filetype, such as ['jpg', 'jpeg']."""
+        groupings = {}
+        for ext, name in cls.filetypes.iteritems():
+            groupings.setdefault(name, []).append(ext)
+            groupings[name].sort()
+        return groupings
+
     def show(self):
         # show the figure window
         from matplotlib.pyplot import show
@@ -362,7 +374,7 @@ def get_javascript(cls, stream=None):
             json.dumps(extensions)))
 
         output.write("mpl.default_extension = {0};".format(
-            json.dumps(FigureCanvasWebAggCore.get_default_filetype())))
+            json.dumps(rcParams['savefig.format'])))
 
         if stream is None:
             return output.getvalue()