fix

PythonServer/pos-python-server.py

@@ -37,6 +37,7 @@ def get_pv(pvlist: str):
     for pv in pvs:
         if (
             result[pv.pvname]["count"] is not None
+            and result[pv.pvname]["value"] is not None
             and result[pv.pvname]["count"] > 1
             and type(result[pv.pvname]["value"]) != list
         ):