diff --git a/InvenTree/order/models.py b/InvenTree/order/models.py
index a8d8b12542..bc58a2afa3 100644
--- a/InvenTree/order/models.py
+++ b/InvenTree/order/models.py
@@ -112,7 +112,8 @@ class PurchaseOrder(Order):
         help_text=_('Company')
     )
 
-    received_by = models.ForeignKey(User,
+    received_by = models.ForeignKey(
+        User,
         on_delete=models.SET_NULL,
         blank=True, null=True,
         related_name='+'
@@ -242,7 +243,6 @@ class PurchaseOrder(Order):
                 po=str(self))
             )
 
-
         # Update the number of parts received against the particular line item
         line.received += quantity
         line.save()
@@ -313,4 +313,4 @@ class PurchaseOrderLineItem(OrderLineItem):
     def remaining(self):
         """ Calculate the number of items remaining to be received """
         r = self.quantity - self.received
-        return max(r, 0)
\ No newline at end of file
+        return max(r, 0)
diff --git a/InvenTree/order/views.py b/InvenTree/order/views.py
index 6e2cdf4a98..b5b9540fed 100644
--- a/InvenTree/order/views.py
+++ b/InvenTree/order/views.py
@@ -5,7 +5,6 @@ Django views for interacting with Order app
 # -*- coding: utf-8 -*-
 from __future__ import unicode_literals
 
-from django.db import transaction
 from django.shortcuts import get_object_or_404
 from django.utils.translation import ugettext as _
 from django.views.generic import DetailView, ListView
@@ -252,7 +251,7 @@ class PurchaseOrderReceive(AjaxView):
                     receive = int(receive)
                 except ValueError:
                     # In the case on an invalid input, reset to default
-                    receive = line.remaining() 
+                    receive = line.remaining()
                     errors = True
 
                 if receive < 0:
diff --git a/InvenTree/stock/models.py b/InvenTree/stock/models.py
index a3a0c1d6ef..a53e61f86d 100644
--- a/InvenTree/stock/models.py
+++ b/InvenTree/stock/models.py
@@ -251,7 +251,7 @@ class StockItem(models.Model):
     updated = models.DateField(auto_now=True, null=True)
 
     purchase_order = models.ForeignKey(
-        'order.PurchaseOrder', 
+        'order.PurchaseOrder',
         on_delete=models.SET_NULL,
         related_name='stock_items',
         blank=True, null=True,