revert commits done before MZ holidays

they are all not neccessary for SINQ SE operation

Change-Id: Ic9adcccf685752ab90bb6b86005ac8e04b302855

frappy/modules.py

@@ -329,6 +329,7 @@ class Module(HasAccessibles):
 
     # reference to the dispatcher (used for sending async updates)
     DISPATCHER = None
+    attachedModules = None
     pollInfo = None
     triggerPoll = None  # trigger event for polls. used on io modules and modules without io
 
@@ -346,9 +347,7 @@ class Module(HasAccessibles):
         self.accessLock = threading.RLock()  # for read_* / write_* methods
         self.updateLock = threading.RLock()  # for announceUpdate
         self.polledModules = []  # modules polled by thread started in self.startModules
-        self.attachedModules = {}
         errors = []
-        self._isinitialized = False
 
         # handle module properties
         # 1) make local copies of properties
@@ -640,13 +639,6 @@ class Module(HasAccessibles):
         all parameters are polled once
         """
 
-    def shutdownModule(self):
-        """called when the sever shuts down
-
-        any cleanup-work should be performed here, like closing threads and
-        saving data.
-        """
-
     def doPoll(self):
         """polls important parameters like value and status
 
@@ -940,12 +932,10 @@ class Attached(Property):
     def __get__(self, obj, owner):
         if obj is None:
             return self
-        if self.name not in obj.attachedModules:
-            modobj = obj.DISPATCHER.get_module(super().__get__(obj, owner))
-            if not isinstance(modobj, self.basecls):
-                raise ConfigError(f'attached module {self.name}={modobj.name!r} '\
-                    f'must inherit from {self.basecls.__qualname__!r}')
-            obj.attachedModules[self.name] = modobj
+        if obj.attachedModules is None:
+            # return the name of the module (called from Server on startup)
+            return super().__get__(obj, owner)
+        # return the module (called after startup)
         return obj.attachedModules.get(self.name)  # return None if not given
 
     def copy(self):