PEP fixes

InvenTree/report/models.py

@@ -16,12 +16,12 @@ from django.conf import settings
 from django.core.validators import FileExtensionValidator
 from django.core.exceptions import ValidationError
 
+from stock.models import StockItem
+
 from InvenTree.helpers import validateFilterString
 
 from django.utils.translation import gettext_lazy as _
 
-from part import models as PartModels
-
 try:
     from django_weasyprint import WeasyTemplateResponseMixin
 except OSError as err:
@@ -163,6 +163,7 @@ class ReportTemplateBase(models.Model):
     class Meta:
         abstract = True
 
+
 class TestReport(ReportTemplateBase):
     """
     Render a TestReport against a StockItem object.