runner: use context manager for open(.., 'w')

slapos/runner/runnertest.py

@@ -89,9 +89,8 @@ class SlaprunnerTestCase(unittest.TestCase):
     self.app = views.app.test_client()
     self.app.config = views.app.config
     #Create password recover code
-    rpwd = open(os.path.join(views.app.config['etc_dir'], '.rcode'), 'w')
-    rpwd.write(self.rcode)
-    rpwd.close()
+    with open(os.path.join(views.app.config['etc_dir'], '.rcode'), 'w') as rpwd:
+      rpwd.write(self.rcode)
 
   def tearDown(self):
     """Remove all test data"""

slapos/runner/utils.py

@@ -296,9 +296,8 @@ def config_SR_folder(config):
       #create symlink
       os.symlink(source, destination)
       #write config file
-      cf = open(cfg, 'w')
-      cf.write(current_project + "#" + folder)
-      cf.close()
+      with open(cfg, 'w') as cf:
+        cf.write(current_project + '#' + folder)
 
 
 def loadSoftwareRList(config):

slapos/runner/views.py

@@ -536,12 +536,11 @@ def saveParameterXml():
   content = request.form['parameter'].encode("utf-8")
   param_path = os.path.join(app.config['etc_dir'], ".parameter.xml")
   try:
-    f = open(param_path, 'w')
-    f.write(content)
-    f.close()
+    with open(param_path, 'w') as f:
+      f.write(content)
     result = readParameters(param_path)
   except Exception as e:
-      result = str(e)
+    result = str(e)
   software_type = None
   if request.form['software_type']:
     software_type = request.form['software_type']