Store even a single name as a list.

Now `_names` within `Base` is always a list.

luxtronik/datatypes.py

@@ -19,7 +19,11 @@ def __init__(self, name, writeable=False):
         # save the raw value only since the user value
         # could be build at any time
         self._raw = None
-        self._name = name
+        if isinstance(name, list):
+            self._names = name
+        else:
+            self._names = [name]
+        assert self._names.len() > 0 , "At least one name is required"
         self.writeable = writeable
 
     @classmethod
@@ -35,17 +39,11 @@ def from_heatpump(cls, value):
     @property
     def name(self):
         """Return the (most common) name of the entry."""
-        if isinstance(self._name, list):
-            return self._name[0]
-        else:
-            return self._name
+        return self._names[0]
 
     def get_supported_names(self):
         """Return a list of all supported entry names."""
-        if isinstance(self._name, list):
-            return self._name
-        else:
-            return [self._name]
+        return self._names
 
     def check_name(self, name):
         """