Format python files using yapf

Change-Id: I8b7b97efb6bfdcceef9efc533cdaa0675ab7db40
diff --git a/tools/performance_try.py b/tools/performance_try.py
index 0c09e70..5f1b4b3 100755
--- a/tools/performance_try.py
+++ b/tools/performance_try.py
@@ -11,12 +11,16 @@
 SCRIPT = '/google/data/ro/teams/dart/golem/bin/golem4.dart'
 DART = os.path.join(utils.THIRD_PARTY, 'dart-sdk', 'bin', 'dart')
 
+
 def Main():
-  args = sys.argv[1:]
-  if len(args) != 1 or '--help' in args:
-    print('Performance tracking takes exactly one argument, the name for display')
-    return 1
-  subprocess.check_call([DART, SCRIPT, args[0]])
+    args = sys.argv[1:]
+    if len(args) != 1 or '--help' in args:
+        print(
+            'Performance tracking takes exactly one argument, the name for display'
+        )
+        return 1
+    subprocess.check_call([DART, SCRIPT, args[0]])
+
 
 if __name__ == '__main__':
-  sys.exit(Main())
+    sys.exit(Main())