Add basic handling of kwdefaults

Author: benclifford

ipyparallel/serialize/canning.py

@@ -193,6 +193,11 @@ def __init__(self, f):
         else:
             self.defaults = None
 
+        if f.__kwdefaults__:
+            self.kwdefaults = can(f.__kwdefaults__)
+        else:
+            self.kwdefaults = None
+
         closure = py3compat.get_closure(f)
         if closure:
             self.closure = tuple(can(cell) for cell in closure)
@@ -218,11 +223,18 @@ def get_object(self, g=None):
             defaults = tuple(uncan(cfd, g) for cfd in self.defaults)
         else:
             defaults = None
+
+        if self.kwdefaults:
+            kwdefaults = uncan(self.kwdefaults)
+        else:
+            kwdefaults = None
+
         if self.closure:
             closure = tuple(uncan(cell, g) for cell in self.closure)
         else:
             closure = None
         newFunc = FunctionType(self.code, g, self.__name__, defaults, closure)
+        newFunc.__kwdefaults__ = kwdefaults
         return newFunc