Resolve python 3.5's urllib dependency in abalone-tutorial. (#4633)

tensorflow/examples/tutorials/estimators/abalone.py

@@ -18,7 +18,7 @@ from __future__ import division
 from __future__ import print_function
 
 import tempfile
-import urllib
+from six.moves import urllib
 
 import numpy as np
 import tensorflow as tf
@@ -51,7 +51,7 @@ def maybe_download():
     train_file_name = FLAGS.train_data
   else:
     train_file = tempfile.NamedTemporaryFile(delete=False)
-    urllib.urlretrieve("http://download.tensorflow.org/data/abalone_train.csv", train_file.name)  # pylint: disable=line-too-long
+    urllib.request.urlretrieve("http://download.tensorflow.org/data/abalone_train.csv", train_file.name)  # pylint: disable=line-too-long
     train_file_name = train_file.name
     train_file.close()
     print("Training data is downloaded to %s" % train_file_name)
@@ -60,7 +60,7 @@ def maybe_download():
     test_file_name = FLAGS.test_data
   else:
     test_file = tempfile.NamedTemporaryFile(delete=False)
-    urllib.urlretrieve("http://download.tensorflow.org/data/abalone_test.csv", test_file.name)  # pylint: disable=line-too-long
+    urllib.request.urlretrieve("http://download.tensorflow.org/data/abalone_test.csv", test_file.name)  # pylint: disable=line-too-long
     test_file_name = test_file.name
     test_file.close()
     print("Test data is downloaded to %s" % test_file_name)
@@ -69,7 +69,7 @@ def maybe_download():
     predict_file_name = FLAGS.predict_data
   else:
     predict_file = tempfile.NamedTemporaryFile(delete=False)
-    urllib.urlretrieve("http://download.tensorflow.org/data/abalone_predict.csv", predict_file.name)  # pylint: disable=line-too-long
+    urllib.request.urlretrieve("http://download.tensorflow.org/data/abalone_predict.csv", predict_file.name)  # pylint: disable=line-too-long
     predict_file_name = predict_file.name
     predict_file.close()
     print("Prediction data is downloaded to %s" % predict_file_name)