Merge pull request #381 from riddlesio/master

fix so partial functions can be passed to field, solves issue #316

Author: syrusakbary

graphene/types/field.py

@@ -60,7 +60,7 @@ def __init__(self, type, args=None, resolver=None, source=None,
 
     @property
     def type(self):
-        if inspect.isfunction(self._type):
+        if inspect.isfunction(self._type) or type(self._type) is partial:
             return self._type()
         return self._type