make changes to sockets.

replace black+isort with ruff

upd examples

examples/observer/__main__.py

@@ -13,23 +13,23 @@ class App:
 
     # define an 'on_update' callback function to receive event updates
     def on_update(self, event):
-        if event == "pdirty":
-            print("pdirty!")
-        elif event == "ldirty":
+        if event == 'pdirty':
+            print('pdirty!')
+        elif event == 'ldirty':
             for bus in self.vban.bus:
                 if bus.levels.isdirty:
                     print(bus, bus.levels.all)
 
 
 def main():
-    KIND_ID = "banana"
+    KIND_ID = 'banana'
 
     with vban_cmd.api(KIND_ID, pdirty=True, ldirty=True) as vban:
         App(vban)
 
-        while cmd := input("Press <Enter> to exit\n"):
+        while _ := input('Press <Enter> to exit\n'):
             pass
 
 
-if __name__ == "__main__":
+if __name__ == '__main__':
     main()