Enforce quoting style in Travis. (#4589)

python/ray/tests/test_autoscaler.py

@@ -388,7 +388,7 @@ class AutoscalingTest(unittest.TestCase):
         rtc1.clear()
         autoscaler.update()
         # Synchronization: wait for launchy thread to be blocked on rtc1
-        if hasattr(rtc1, '_cond'):  # Python 3.5
+        if hasattr(rtc1, "_cond"):  # Python 3.5
             waiters = rtc1._cond._waiters
         else:  # Python 2.7
             waiters = rtc1._Event__cond._Condition__waiters
@@ -539,9 +539,9 @@ class AutoscalingTest(unittest.TestCase):
 
     def testReportsConfigFailures(self):
         config = copy.deepcopy(SMALL_CLUSTER)
-        config['provider']['type'] = 'external'
+        config["provider"]["type"] = "external"
         config = fillout_defaults(config)
-        config['provider']['type'] = 'mock'
+        config["provider"]["type"] = "mock"
         config_path = self.write_config(config)
         self.provider = MockProvider()
         runner = MockProcessRunner(fail_cmds=["cmd1"])

python/ray/tests/test_basic.py

@@ -2678,7 +2678,7 @@ def test_raylet_is_robust_to_random_messages(ray_start_regular):
     # Try to bring down the node manager:
     s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
     s.connect((node_manager_address, node_manager_port))
-    s.send(1000 * b'asdf')
+    s.send(1000 * b"asdf")
 
     @ray.remote
     def f():

python/ray/tests/test_credis.py

@@ -24,18 +24,18 @@ class CredisTest(unittest.TestCase):
 
     def test_credis_started(self):
         assert "redis_address" in self.config
-        primary = parse_client(self.config['redis_address'])
+        primary = parse_client(self.config["redis_address"])
         assert primary.ping() is True
-        member = primary.lrange('RedisShards', 0, -1)[0]
+        member = primary.lrange("RedisShards", 0, -1)[0]
         shard = parse_client(member.decode())
 
-        # Check that primary has loaded credis' master module.
-        chain = primary.execute_command('MASTER.GET_CHAIN')
+        # Check that primary has loaded credis's master module.
+        chain = primary.execute_command("MASTER.GET_CHAIN")
         assert len(chain) == 1
 
         # Check that the shard has loaded credis' member module.
         assert chain[0] == member
-        assert shard.execute_command('MEMBER.SN') == -1
+        assert shard.execute_command("MEMBER.SN") == -1
 
 
 if __name__ == "__main__":

python/ray/tests/test_failure.py

@@ -702,7 +702,7 @@ def test_connect_with_disconnected_node(shutdown_only):
     # This node is killed by SIGTERM, ray_monitor will not mark it again.
     removing_node = cluster.add_node(num_cpus=0, _internal_config=config)
     cluster.remove_node(removing_node, allow_graceful=True)
-    with pytest.raises(Exception, match=('Timing out of wait.')):
+    with pytest.raises(Exception, match=("Timing out of wait.")):
         wait_for_errors(ray_constants.REMOVED_NODE_ERROR, 3, timeout=2)
     # There is no connection error to a dead node.
     info = relevant_errors(ray_constants.RAYLET_CONNECTION_ERROR)

python/ray/tests/test_monitors.py

@@ -79,7 +79,7 @@ def _test_cleanup_on_driver_exit(num_redis_shards):
 
         ray.shutdown()
 
-    success = multiprocessing.Value('b', False)
+    success = multiprocessing.Value("b", False)
     driver = multiprocessing.Process(target=Driver, args=(success, ))
     driver.start()
     # Wait for client to exit.

python/ray/tests/utils.py

@@ -41,7 +41,7 @@ def run_and_get_output(command):
         p = subprocess.Popen(command, stdout=tmp, stderr=tmp)
         if p.wait() != 0:
             raise RuntimeError("ray start did not terminate properly")
-        with open(tmp.name, 'r') as f:
+        with open(tmp.name, "r") as f:
             result = f.readlines()
             return "\n".join(result)