text: from django.contrib import admin
  from . import models
  
  
  @admin.register(models.Module)
  class ModuleAdmin(admin.ModelAdmin):
      actions = None
      list_display = ['label', 'installed']
      readonly_fields = ['label']
  
      def has_add_permission(self, request):
          return False
  
      def has_delete_permission(self, request, obj=None):
          return False
  