made parallel optimize_restart responsive to ctrl+c

GPy/core/model.py

@@ -188,10 +188,10 @@ class model(parameterised):
 
 
         """
-
         initial_parameters = self._get_params_transformed()
 
         if parallel:
+            try:
                 jobs = []
                 pool = mp.Pool(processes=num_processes)
                 for i in range(Nrestarts):
@@ -201,6 +201,10 @@ class model(parameterised):
 
                 pool.close() # signal that no more data coming in
                 pool.join()  # wait for all the tasks to complete
+            except KeyboardInterrupt:
+                print "Ctrl+c received, terminating and joining pool."
+                pool.terminate()
+                pool.join()
 
         for i in range(Nrestarts):
             try: