diff --git a/InvenTree/order/forms.py b/InvenTree/order/forms.py
index ba2707133f..c7942e3549 100644
--- a/InvenTree/order/forms.py
+++ b/InvenTree/order/forms.py
@@ -49,4 +49,3 @@ class EditPurchaseOrderLineItemForm(HelperForm):
             'reference',
             'notes',
         ]
-
diff --git a/InvenTree/order/templates/order/purchase_order_detail.html b/InvenTree/order/templates/order/purchase_order_detail.html
index 7028f96a8b..4360f4de4f 100644
--- a/InvenTree/order/templates/order/purchase_order_detail.html
+++ b/InvenTree/order/templates/order/purchase_order_detail.html
@@ -83,7 +83,9 @@ InvenTree | {{ order }}
         <th data-field='received'>Received</th>
         {% endif %}
         <th data-field='notes'>Note</th>
+        {% if order.status == OrderStatus.PENDING %}
         <th data-field='buttons'></th>
+        {% endif %}
     </tr>
     {% for line in order.lines.all %}
     <tr>
@@ -107,6 +109,7 @@ InvenTree | {{ order }}
         <td>
             {{ line.notes }}
         </td>
+        {% if order.status == OrderStatus.PENDING %}
         <td>
             <div class='btn-group'>
                 <button class='btn btn-default btn-edit' id='edit-line-item-{{ line.id }} title='Edit line item' onclick='editPurchaseOrderLineItem()'>
@@ -117,6 +120,7 @@ InvenTree | {{ order }}
                 </button>
             </div>
         </td>
+        {% endif %}
     </tr>
     {% endfor %}
 </table>
diff --git a/InvenTree/order/views.py b/InvenTree/order/views.py
index 3b789301de..ea9da7e373 100644
--- a/InvenTree/order/views.py
+++ b/InvenTree/order/views.py
@@ -190,7 +190,7 @@ class OrderParts(AjaxView):
             except SupplierPart.DoesNotExist:
                 continue
 
-            if not supplier.name in suppliers:
+            if supplier.name not in suppliers:
                 supplier.order_items = []
                 supplier.selected_purchase_order = None
                 suppliers[supplier.name] = supplier
@@ -387,7 +387,7 @@ class OrderParts(AjaxView):
 
         if form_step == 'select_parts':
             # No errors? Proceed to PO selection form
-            if part_errors == False:
+            if part_errors is False:
                 self.ajax_template_name = 'order/order_wizard/select_pos.html'
 
             else:
@@ -567,4 +567,4 @@ class POLineItemDelete(AjaxDeleteView):
     def get_data(self):
         return {
             'danger': 'Deleted line item',
-        }
\ No newline at end of file
+        }
diff --git a/setup.cfg b/setup.cfg
index 697f6d1f02..d6e7ca056a 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -3,6 +3,8 @@ ignore =
 	# - W293 - blank lines contain whitespace
 	W293,
 	# - E501 - line too long (82 characters)
-	E501
+	E501,
+	# - C901 - function is too complex
+	C901,
 exclude = .git,__pycache__,*/migrations/*
 max-complexity = 20