remove some more unneeded return values

src/fenrir-package/core/screenManager.py

@@ -18,7 +18,7 @@ class screenManager():
 
     def update(self, environment):
         if not self.isSuspendingScreen(environment):
-            environment = environment['runtime']['screenDriver'].update(environment)
+            environment['runtime']['screenDriver'].update(environment)
             environment['screenData']['lastScreenUpdate'] = time.time()
 
     def isSuspendingScreen(self, environment):

src/fenrir-package/screenDriver/linux.py

@@ -10,10 +10,10 @@ class driver():
         self.vcsaDevicePath = '/dev/vcsa'
     
     def initialize(self, environment):
-        return environment
+        pass
     
     def shutdown(self, environment):
-        return environment
+        pass
     
     def insert_newlines(self, string, every=64):
         return '\n'.join(string[i:i+every] for i in range(0, len(string), every))
@@ -26,7 +26,6 @@ class driver():
             currScreenFile.close()
         except Exception as e:
             environment['runtime']['debug'].writeDebugOut(environment,str(e),debug.debugLevel.ERROR)   
-
         return currScreen
 
     def getIgnoreScreens(self):
@@ -114,5 +113,3 @@ class driver():
                 environment['screenData']['newDelta'] = ''.join(x[2:] for x in diffList if x.startswith('+ '))             
                 environment['screenData']['newNegativeDelta'] = ''.join(x[2:] for x in diffList if x.startswith('- '))
 
-        return environment
-

src/fenrir-package/soundDriver/generic.py

@@ -15,10 +15,10 @@ class driver():
             self.soundFileCommand = 'play -q -v fenrirVolume fenrirSoundFile'
         if self.frequenceCommand == '':
             self.frequenceCommand = '=play -q -v fenrirVolume -n -c1 synth fenrirDuration sine fenrirFrequence'
-        return environment
+        return
     def shutdown(self, environment):
         self.cancel()
-        return environment
+        return
     def playFrequence(self, frequence, duration, adjustVolume):
         if interrupt:
             self.cancel()

src/fenrir-package/soundDriver/gstreamer.py

@@ -20,9 +20,9 @@ class driver:
             return
     def initialize(self, environment):
         if self._initialized:
-           return environment
+           return
         if not _gstreamerAvailable:
-            return environment
+            return
 
         self._player = Gst.ElementFactory.make('playbin', 'player')
         bus = self._player.get_bus()
@@ -41,9 +41,14 @@ class driver:
         self._source.link(self._sink)
 
         self._initialized = True
-        return environment        
+        return        
     def shutdown(self, environment):
-        return environment
+        global _gstreamerAvailable
+        if not _gstreamerAvailable:
+            return
+        self.cancel()
+        self._initialized = False
+        _gstreamerAvailable = False
 
     def _onPlayerMessage(self, bus, message):
         if message.type == Gst.MessageType.EOS:
@@ -92,12 +97,6 @@ class driver:
         self._pipeline.set_state(Gst.State.NULL)
     def setVolume(self, volume):
         self.volume = volume  
-    def shutdown(self):
-        global _gstreamerAvailable
-        if not _gstreamerAvailable:
-            return
-        self.cancel()
-        self._initialized = False
-        _gstreamerAvailable = False
+
 
 

src/fenrir-package/speechDriver/espeak.py

@@ -13,9 +13,9 @@ class driver():
         except:
             self._initialized = False
     def initialize(self, environment):
-        return environment            
+        pass          
     def shutdown(self, environment):
-        return environment
+        pass
 
     def speak(self,text, queueable=True):
         if not self._isInitialized:

src/fenrir-package/speechDriver/generic.py

@@ -7,9 +7,8 @@ class driver():
         pass
     def initialize(self, environment):
         self._isInitialized = False    
-        return environment    
     def shutdown(self, environment):
-        return environment
+        pass
 
     def speak(self,text, queueable=True):
         if not self._isInitialized: