[tools] Run autopep8 and apply fixes found. (#739)

tools/compare.py

 #!/usr/bin/env python
 
+import unittest
 """
 compare.py - versatile benchmark output compare tool
 """
@@ -244,9 +245,6 @@ def main():
         print(ln)
 
 
-import unittest
-
-
 class TestParser(unittest.TestCase):
     def setUp(self):
         self.parser = create_parser()
@@ -402,7 +400,7 @@ class TestParser(unittest.TestCase):
 
 
 if __name__ == '__main__':
-    #unittest.main()
+    # unittest.main()
     main()
 
 # vim: tabstop=4 expandtab shiftwidth=4 softtabstop=4

tools/gbench/report.py

+import unittest
 """report.py - Utilities for reporting statistics about benchmark results
 """
 import os
@@ -270,9 +271,6 @@ def generate_difference_report(
 # Unit tests
 
 
-import unittest
-
-
 class TestGetUniqueBenchmarkNames(unittest.TestCase):
     def load_results(self):
         import json
@@ -300,6 +298,7 @@ class TestGetUniqueBenchmarkNames(unittest.TestCase):
         for i in range(0, len(output_lines)):
             self.assertEqual(expect_lines[i], output_lines[i])
 
+
 class TestReportDifference(unittest.TestCase):
     def load_results(self):
         import json

tools/gbench/util.py

@@ -12,6 +12,8 @@ IT_JSON       = 1
 IT_Executable = 2
 
 _num_magic_bytes = 2 if sys.platform.startswith('win') else 4
+
+
 def is_executable_file(filename):
     """
     Return 'True' if 'filename' names a valid file which is likely
@@ -46,7 +48,7 @@ def is_json_file(filename):
         with open(filename, 'r') as f:
             json.load(f)
         return True
-    except:
+    except BaseException:
         pass
     return False
 
@@ -84,6 +86,7 @@ def check_input_file(filename):
         sys.exit(1)
     return ftype
 
+
 def find_benchmark_flag(prefix, benchmark_flags):
     """
     Search the specified list of flags for a flag matching `<prefix><arg>` and
@@ -97,6 +100,7 @@ def find_benchmark_flag(prefix, benchmark_flags):
             result = f[len(prefix):]
     return result
 
+
 def remove_benchmark_flags(prefix, benchmark_flags):
     """
     Return a new list containing the specified benchmark_flags except those
@@ -105,6 +109,7 @@ def remove_benchmark_flags(prefix, benchmark_flags):
     assert prefix.startswith('--') and prefix.endswith('=')
     return [f for f in benchmark_flags if not f.startswith(prefix)]
 
+
 def load_benchmark_results(fname):
     """
     Read benchmark output from a file and return the JSON object.