Improve __del__ error message (#1564)

* avoid "Exception ignored in function BusABC.__del__"

* improve error message

Author: zariiii9003

can/bus.py

@@ -439,7 +439,7 @@ def __exit__(self, exc_type, exc_val, exc_tb):
 
     def __del__(self) -> None:
         if not self._is_shutdown:
-            LOG.warning("%s was not properly shut down", self.__class__)
+            LOG.warning("%s was not properly shut down", self.__class__.__name__)
             # We do some best-effort cleanup if the user
             # forgot to properly close the bus instance
             with contextlib.suppress(AttributeError):

can/interfaces/vector/canlib.py

@@ -6,6 +6,7 @@
 
 # Import Standard Python Modules
 # ==============================
+import contextlib
 import ctypes
 import logging
 import os
@@ -869,9 +870,11 @@ def flush_tx_buffer(self) -> None:
 
     def shutdown(self) -> None:
         super().shutdown()
-        self.xldriver.xlDeactivateChannel(self.port_handle, self.mask)
-        self.xldriver.xlClosePort(self.port_handle)
-        self.xldriver.xlCloseDriver()
+
+        with contextlib.suppress(VectorError):
+            self.xldriver.xlDeactivateChannel(self.port_handle, self.mask)
+            self.xldriver.xlClosePort(self.port_handle)
+            self.xldriver.xlCloseDriver()
 
     def reset(self) -> None:
         self.xldriver.xlDeactivateChannel(self.port_handle, self.mask)