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Workaround for passing empty list to ray.wait. (#1043)

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* Workaround for passing empty list to ray.wait.

* Add test for passing empty list to wait.
This commit is contained in:
Robert Nishihara
2017-10-01 11:45:02 -07:00
committed by Philipp Moritz
parent 79e013e876
commit ad61af7333
2 changed files with 11 additions and 0 deletions
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test/runtest.py
+5
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@@ -704,6 +704,11 @@ class APITest(unittest.TestCase):
x = ray.put(1)
self.assertRaises(Exception, lambda: ray.wait([x, x]))
# Make sure it is possible to call wait with an empty list.
ready_ids, remaining_ids = ray.wait([])
self.assertEqual(ready_ids, [])
self.assertEqual(remaining_ids, [])
def testMultipleWaitsAndGets(self):
# It is important to use three workers here, so that the three tasks
# launched in this experiment can run at the same time.