fix(devices): improves code quality

riocli/device/delete.py

@@ -39,10 +39,9 @@
 @click.option('--force', '-f', '--silent', is_flag=True, default=False,
               help='Skip confirmation')
 @click.option('--delete-all', '-a', is_flag=True, default=False,
-              help='deletes all devices')
+              help='Delete all devices')
 @click.option('--workers', '-w',
-              help="number of parallel workers while running delete devices "
-                   "command. defaults to 10.", type=int, default=10)
+              help="Number of parallel workers for deleting devices. Defaults to 10.", type=int, default=10)
 @click.argument('device-name-or-regex', type=str, default="")
 @with_spinner(text='Deleting device...')
 def delete_device(
@@ -123,13 +122,20 @@ def delete_device(
             tabulate_data(data, headers=['Name', 'Status'])
 
         spinner.write('')
-        if success_count:
+
+        if failed_count == 0:
             spinner.text = click.style(
-                '{0} Devices(s) deleted successfully.'.format(success_count), Colors.GREEN)
+                'All Devices(s) deleted successfully.', Colors.GREEN)
             spinner.ok(click.style(Symbols.SUCCESS, Colors.GREEN))
-        if failed_count:
+
+        elif success_count == 0:
+            spinner.text = click.style(
+                'Failed to delete devices', Colors.YELLOW)
+            spinner.ok(click.style(Symbols.WARNING, Colors.YELLOW))
+
+        else:
             spinner.text = click.style(
-                '{0} Devices(s) deletion failed.'.format(failed_count), Colors.YELLOW)
+                '{}/{} devices deleted successfully'.format(success_count, success_count+failed_count), Colors.YELLOW)
             spinner.ok(click.style(Symbols.WARNING, Colors.YELLOW))
     except Exception as e:
         spinner.text = click.style(