Optimize "open" method with context manager

Replace the classic open() method with opening context
manager to open file so that the file will be closed
even if an exception occurs.

Change-Id: I0d53b7a38fee6a2ef8ce74496d220adc954afb98

diff --git a/neutron/tests/tempest/common/accounts.py b/neutron/tests/tempest/common/accounts.py
index 1a50e3caf8ea5c3e820ca0f2c7d36b8ff11a7f87..644073979011aa8c41ca06990a8ca373aa04abe4 100644 (file)
--- a/neutron/tests/tempest/common/accounts.py
+++ b/neutron/tests/tempest/common/accounts.py
@@ -28,8 +28,8 @@ LOG = logging.getLogger(__name__)
 
 
 def read_accounts_yaml(path):
-    yaml_file = open(path, 'r')
-    accounts = yaml.load(yaml_file)
+    with open(path, 'r') as yaml_file:
+        accounts = yaml.load(yaml_file)
     return accounts