further style fixes

python/pyspark/heapq3.py

@@ -883,7 +883,8 @@ def nlargest(n, iterable, key=None):
 
 
 if __name__ == "__main__":
-    import doctest, sys
+    import doctest
+    import sys
     (failure_count, test_count) = doctest.testmod()
     if failure_count:
         sys.exit(-1)

python/pyspark/ml/stat.py

@@ -16,6 +16,7 @@
 #
 
 import sys
+
 from pyspark import since, SparkContext
 from pyspark.ml.common import _java2py, _py2java
 from pyspark.ml.wrapper import _jvm

python/pyspark/ml/tuning.py

@@ -16,9 +16,10 @@
 #
 import itertools
 import sys
-import numpy as np
 from multiprocessing.pool import ThreadPool
 
+import numpy as np
+
 from pyspark import since, keyword_only
 from pyspark.ml import Estimator, Model
 from pyspark.ml.common import _py2java

python/pyspark/mllib/random.py

@@ -20,7 +20,6 @@
 """
 
 import sys
-
 from functools import wraps
 
 from pyspark import since

python/pyspark/mllib/regression.py

@@ -16,9 +16,10 @@
 #
 
 import sys
+import warnings
+
 import numpy as np
 from numpy import array
-import warnings
 
 from pyspark import RDD, since
 from pyspark.streaming.dstream import DStream

python/pyspark/sql/conf.py

@@ -16,6 +16,7 @@
 #
 
 import sys
+
 from pyspark import since
 from pyspark.rdd import ignore_unicode_prefix