Fix bug when counter is empty

PythonServer/pos-python-server.py

@@ -38,7 +38,7 @@ async def get_pv(pvlist: str):
     result = {}
     for pv in pvs:
         result[pv.pvname] = pv._args
-        if result[pv.pvname]["count"] > 1:
+        if result[pv.pvname]["count"] is not None and result[pv.pvname]["count"] > 1:
             result[pv.pvname]["value"] = result[pv.pvname]["value"].tolist()
         pv.clear_auto_monitor()
     return result