[SPARK-2470] PEP8 fixes to tests.py

Author: nchammas

python/pyspark/tests.py

@@ -52,12 +52,13 @@ class PySparkTestCase(unittest.TestCase):
     def setUp(self):
         self._old_sys_path = list(sys.path)
         class_name = self.__class__.__name__
-        self.sc = SparkContext('local[4]', class_name , batchSize=2)
+        self.sc = SparkContext('local[4]', class_name, batchSize=2)
 
     def tearDown(self):
         self.sc.stop()
         sys.path = self._old_sys_path
 
+
 class TestCheckpoint(PySparkTestCase):
 
     def setUp(self):
@@ -190,24 +191,27 @@ def test_deleting_input_files(self):
 
     def testAggregateByKey(self):
         data = self.sc.parallelize([(1, 1), (1, 1), (3, 2), (5, 1), (5, 3)], 2)
+
         def seqOp(x, y):
             x.add(y)
             return x
 
         def combOp(x, y):
             x |= y
             return x
-          
+
         sets = dict(data.aggregateByKey(set(), seqOp, combOp).collect())
         self.assertEqual(3, len(sets))
         self.assertEqual(set([1]), sets[1])
         self.assertEqual(set([2]), sets[3])
         self.assertEqual(set([1, 3]), sets[5])
 
+
 class TestIO(PySparkTestCase):
 
     def test_stdout_redirection(self):
         import subprocess
+
         def func(x):
             subprocess.check_call('ls', shell=True)
         self.sc.parallelize([1]).foreach(func)
@@ -479,7 +483,7 @@ def test_module_dependency(self):
             |    return x + 1
             """)
         proc = subprocess.Popen([self.sparkSubmit, "--py-files", zip, script],
-            stdout=subprocess.PIPE)
+                                stdout=subprocess.PIPE)
         out, err = proc.communicate()
         self.assertEqual(0, proc.returncode)
         self.assertIn("[2, 3, 4]", out)