update

inventory/management/commands/set_vat.py

@@ -1,5 +1,6 @@
+from django.core.management.base import BaseCommand
 from inventory.models import VatRate
 from decimal import Decimal
-class Command:
+class Command(BaseCommand):
     def handle(self, *args, **kwargs):
         VatRate.objects.get_or_create(rate=Decimal('0.15'), is_active=True)