period for update too

src/agentx-ntpsec.py

@@ -1,4 +1,4 @@
-pass_valueimport ntp.packe0
+import ntp.packet
 import threading
 from contextlib import AbstractContextManager
 import time
@@ -324,7 +324,11 @@ if __name__ == '__main__':
         
 
     ntpserver = args.ntpserver
-    period = args.period
+    try:
+        period = int(args.period)
+    except ValueError:
+        logger.error("period must be integer")
+        sys.exit(1)
     
 
     try: