masked type conversion

chriddyp · chriddyp · commit bad0359b5589 · 2014-12-12T14:38:13.000-08:00
diff --git a/plotly/utils.py b/plotly/utils.py
@@ -101,6 +101,9 @@ def numpyJSONEncoder(self, obj):
         if not _numpy_imported:
             raise NotEncodable
 
+        if obj is numpy.ma.core.masked:
+            return float('nan')
+
         if type(obj).__module__.split('.')[0] == numpy.__name__:
             l = obj.tolist()
             try:
