Fix pylint errors

zoe_api/api_endpoint.py

@@ -89,15 +89,15 @@ class APIEndpoint:
         reserved_cores = 0
         reserved_mem = 0
         for e in running_execs:
-            for s in e.services:
-                reserved_cores += s.resource_reservation.cores.min
-                reserved_mem += s.resource_reservation.memory.min
+            for service in e.services:
+                reserved_cores += service.resource_reservation.cores.min
+                reserved_mem += service.resource_reservation.memory.min
 
         new_exec_cores = 0
         new_exec_memory = 0
-        for s in application_description['services']:
-            new_exec_cores += s['resources']['cores']['min'] * s['total_count']
-            new_exec_memory += s['resources']['memory']['min'] * s['total_count']
+        for service in application_description['services']:
+            new_exec_cores += service['resources']['cores']['min'] * service['total_count']
+            new_exec_memory += service['resources']['memory']['min'] * service['total_count']
 
         if quota.cores < reserved_cores + new_exec_cores:
             raise zoe_api.exceptions.ZoeQuotaException('You requested {} cores more than your quota allows, quota exceeded.'.format((reserved_cores + new_exec_cores) - quota.cores))
@@ -420,4 +420,3 @@ class APIEndpoint:
             if e.time_submit + runtime_limit > datetime.utcnow():
                 log.info('Automatically terminating execution {} that has exceeded the run time limit'.format(e.id))
                 self.execution_terminate(e.owner, e.id)
-

zoe_api/entrypoint.py

@@ -75,8 +75,8 @@ def zoe_web_main(test_conf=None) -> int:
     http_server.bind(args.listen_port, args.listen_address)
     http_server.start(num_processes=1)
 
-    pc = PeriodicCallback(api_endpoint.verify_runtime_limit, 300000)
-    pc.start()
+    runtime_limit_cb = PeriodicCallback(api_endpoint.verify_runtime_limit, 300000)
+    runtime_limit_cb.start()
 
     try:
         IOLoop.current().start()