Refs #9092. Accepting and passing keywords.

Code/Mantid/MantidPlot/mantidplotpy/proxies.py

@@ -81,15 +81,15 @@ def _get_argtype(self, argument):
             argtype = int
         return argtype
 
-def threadsafe_call(callable, *args):
+def threadsafe_call(callable, *args, **kwargs):
     """
         Calls the given function with the given arguments
         by passing it through the CrossThreadCall class. This
         ensures that the calls to the GUI functions
         happen on the correct thread.
     """
     caller = CrossThreadCall(callable)
-    return caller.dispatch(*args)
+    return caller.dispatch(*args, **kwargs)
 
 def new_proxy(classType, callable, *args, **kwargs):
     """