Fix show attributes

`show attributes` wasn't being populated since `show_attributes()` was never called.

Also updated `show attributes` to match the color and indentation of `show services`

bumble/controller.py

@@ -46,7 +46,6 @@ from bumble.hci import (
     HCI_LE_Connection_Complete_Event,
     HCI_LE_Read_Remote_Features_Complete_Event,
     HCI_Number_Of_Completed_Packets_Event,
-    HCI_Object,
     HCI_Packet,
 )
 
@@ -1029,7 +1028,7 @@ class Controller:
         }
         return bytes([HCI_SUCCESS])
 
-    def on_hci_le_read_transmit_power_command(self, command):
+    def on_hci_le_read_transmit_power_command(self, _command):
         '''
         See Bluetooth spec Vol 2, Part E - 7.8.74 LE Read Transmit Power Command
         '''

bumble/transport/pyusb.py

@@ -204,7 +204,7 @@ async def open_pyusb_transport(spec):
             await self.sink.stop()
             usb.util.release_interface(self.device, 0)
 
-    usb_find =  usb.core.find
+    usb_find = usb.core.find
     try:
         import libusb_package
     except ImportError:
@@ -215,9 +215,7 @@ async def open_pyusb_transport(spec):
     # Find the device according to the spec moniker
     if ':' in spec:
         vendor_id, product_id = spec.split(':')
-        device = usb_find(
-            idVendor=int(vendor_id, 16), idProduct=int(product_id, 16)
-        )
+        device = usb_find(idVendor=int(vendor_id, 16), idProduct=int(product_id, 16))
     else:
         device_index = int(spec)
         devices = list(

bumble/transport/usb.py

@@ -51,8 +51,12 @@ def load_libusb():
     else:
         if libusb_path := libusb_package.get_library_path():
             logger.debug(f'loading libusb library at {libusb_path}')
-            dll_loader = ctypes.WinDLL if platform.system() == 'Windows' else ctypes.CDLL
-            libusb_dll = dll_loader(str(libusb_path), use_errno=True, use_last_error=True)
+            dll_loader = (
+                ctypes.WinDLL if platform.system() == 'Windows' else ctypes.CDLL
+            )
+            libusb_dll = dll_loader(
+                str(libusb_path), use_errno=True, use_last_error=True
+            )
             usb1.loadLibrary(libusb_dll)