Fixed a ton of Python lint errors, enabled python lint checking.

BUG=

Review URL: https://webrtc-codereview.appspot.com/1166004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@3627 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/tools/python_charts/webrtc/data_helper_test.py b/tools/python_charts/webrtc/data_helper_test.py
index 6282f7b..53b31bd 100644
--- a/tools/python_charts/webrtc/data_helper_test.py
+++ b/tools/python_charts/webrtc/data_helper_test.py
@@ -7,8 +7,6 @@
 #  in the file PATENTS.  All contributing project authors may
 #  be found in the AUTHORS file in the root of the source tree.
 
-__author__ = 'kjellander@webrtc.org (Henrik Kjellander)'
-
 import unittest
 import webrtc.data_helper
 
@@ -16,13 +14,13 @@
 
   def setUp(self):
     # Simulate frame data from two different test runs, with 2 frames each.
-    self.frame_data_0 = [{'frame_number': 0, 'ssim': 0.5, 'psnr': 30.5}, 
+    self.frame_data_0 = [{'frame_number': 0, 'ssim': 0.5, 'psnr': 30.5},
                          {'frame_number': 1, 'ssim': 0.55, 'psnr': 30.55}]
     self.frame_data_1 = [{'frame_number': 0, 'ssim': 0.6, 'psnr': 30.6},
                          {'frame_number': 0, 'ssim': 0.66, 'psnr': 30.66}]
     self.all_data = [ self.frame_data_0, self.frame_data_1 ]
-    
-    # Test with frame_number column in a non-first position sice we need to 
+
+    # Test with frame_number column in a non-first position sice we need to
     # support reordering that to be able to use the gviz_api as we want.
     self.type_description = {
                              'ssim': ('number', 'SSIM'),
@@ -66,13 +64,13 @@
     self.assertEquals(1, row['frame_number'])
     self.assertEquals(0.55, row['ssim_0'])
     self.assertEquals(0.66, row['ssim_1'])
-    
-    description, data_table = helper.CreateData('psnr') 
+
+    description, data_table = helper.CreateData('psnr')
     self.assertEqual(3, len(description))
     self.assertTrue('frame_number' in description)
     self.assertTrue('psnr_0' in description)
-    self.assertTrue('psnr_1' in description) 
-    self.assertEqual(0, len(messages)) 
+    self.assertTrue('psnr_1' in description)
+    self.assertEqual(0, len(messages))
 
     self.assertEquals(2, len(data_table))
     row = data_table[0]
@@ -83,21 +81,21 @@
     self.assertEquals(1, row['frame_number'])
     self.assertEquals(30.55, row['psnr_0'])
     self.assertEquals(30.66, row['psnr_1'])
-  
+
   def testGetOrdering(self):
-    """ Tests that the ordering help method returns a list with frame_number 
+    """ Tests that the ordering help method returns a list with frame_number
        first and the rest sorted alphabetically """
     messages = []
     helper = webrtc.data_helper.DataHelper(self.all_data, self.type_description,
                                            self.names, messages)
-    description, data_table = helper.CreateData('ssim')
+    description, _ = helper.CreateData('ssim')
     columns = helper.GetOrdering(description)
     self.assertEqual(3, len(columns))
     self.assertEqual(0, len(messages))
     self.assertEqual('frame_number', columns[0])
     self.assertEqual('ssim_0', columns[1])
     self.assertEqual('ssim_1', columns[2])
-    
+
   def testCreateConfigurationTable(self):
     messages = []
     helper = webrtc.data_helper.DataHelper(self.all_data, self.type_description,
@@ -110,6 +108,6 @@
     self.assertTrue(description.has_key('input_filename'))
     self.assertEquals('Test 0', data[0]['name'])
     self.assertEquals('Test 1', data[1]['name'])
-    
+
 if __name__ == "__main__":
   unittest.main()