Adapt ParameterRange to later API

Author: fqqb

yamcs-client/src/yamcs/archive/model.py

@@ -275,14 +275,14 @@ def start(self) -> datetime.datetime:
         """
         Start time of this range (inclusive).
         """
-        return parse_server_timestring(self._proto.timeStart)
+        return parse_server_time(self._proto.start)
 
     @property
     def stop(self) -> datetime.datetime:
         """
         Stop time of this range (exclusive).
         """
-        return parse_server_timestring(self._proto.timeStop)
+        return parse_server_time(self._proto.stop)
 
     @property
     def eng_value(self) -> Optional[Any]:

yamcs-client/src/yamcs/core/helpers.py

@@ -54,8 +54,6 @@ def parse_server_timestring(isostring: str) -> datetime:
     The timezone uses the system-default. This can be overriden to UTC
     by setting the environment variable ``PYTHON_YAMCS_CLIENT_UTC``.
     """
-    if not isostring:
-        return None
     naive = datetime.strptime(isostring.replace("Z", "GMT"), "%Y-%m-%dT%H:%M:%S.%f%Z")
     utctime = naive.replace(tzinfo=timezone.utc)