Switch logs to use a single comprehension

endpoints/api/superuser.py

@@ -46,15 +46,17 @@ class SuperUserGetLogsForService(ApiResource):
       if not service in get_services():
         abort(404)
 
+      logs = []
       try:
         with open(app.config['SYSTEM_LOGS_FILE'], 'r') as f:
-          logs = f.readlines()
+          logs = [line for line in f if line.find(service + '[') >= 0]
+
       except Exception as ex:
         logger.exception('Cannot read logs')
         abort(400)
 
       return {
-        'logs': '\n'.join([log for log in logs if log.find(service + '[') >= 0])
+        'logs': '\n'.join(logs)
       }
 
     abort(403)