allow map / parallel function for single-engine views

IPython/parallel/client/remotefunction.py

@@ -182,6 +182,9 b' class ParallelFunction(RemoteFunction):'
             # 'all' is lazily evaluated at execution time, which is now:
             if targets == 'all':
                 targets = client._build_targets(targets)[1]
+            elif isinstance(targets, int):
+                # single-engine view, targets must be iterable
+                targets = [targets]
             nparts = len(targets)
 
         msg_ids = []

IPython/parallel/tests/test_view.py

@@ -534,4 +534,10 b' class TestView(ClusterTestCase):'
         echo = lambda x:x
         self.assertRaisesRemote(NameError, v.apply_sync, echo, r)
 
+    def test_single_engine_map(self):
+        e0 = self.client[self.client.ids[0]]
+        r = range(5)
+        check = [ -1*i for i in r ]
+        result = e0.map_sync(lambda x: -1*x, r)
+        self.assertEquals(result, check)