diff --git a/registrasion/forms.py b/registrasion/forms.py
index cc4b1b4e..eb6f2949 100644
--- a/registrasion/forms.py
+++ b/registrasion/forms.py
@@ -120,8 +120,8 @@ def ProductsForm(category, products):
 
     # Each Category.RENDER_TYPE value has a subclass here.
     RENDER_TYPES = {
-        rego.Category.RENDER_TYPE_QUANTITY : _QuantityBoxProductsForm,
-        rego.Category.RENDER_TYPE_RADIO : _RadioButtonProductsForm,
+        rego.Category.RENDER_TYPE_QUANTITY: _QuantityBoxProductsForm,
+        rego.Category.RENDER_TYPE_RADIO: _RadioButtonProductsForm,
     }
 
     # Produce a subclass of _ProductsForm which we can alter the base_fields on
diff --git a/registrasion/templatetags/registrasion_tags.py b/registrasion/templatetags/registrasion_tags.py
index a6741c0e..a583f1ea 100644
--- a/registrasion/templatetags/registrasion_tags.py
+++ b/registrasion/templatetags/registrasion_tags.py
@@ -8,16 +8,19 @@ register = template.Library()
 
 ProductAndQuantity = namedtuple("ProductAndQuantity", ["product", "quantity"])
 
+
 @register.assignment_tag(takes_context=True)
 def available_categories(context):
     ''' Returns all of the available product categories '''
     return rego.Category.objects.all()
 
+
 @register.assignment_tag(takes_context=True)
 def invoices(context):
     ''' Returns all of the invoices that this user has. '''
     return rego.Invoice.objects.filter(cart__user=context.request.user)
 
+
 @register.assignment_tag(takes_context=True)
 def items_pending(context):
     ''' Returns all of the items that this user has in their current cart,
@@ -29,6 +32,7 @@ def items_pending(context):
     )
     return all_items
 
+
 @register.assignment_tag(takes_context=True)
 def items_purchased(context):
     ''' Returns all of the items that this user has purchased '''
diff --git a/registrasion/views.py b/registrasion/views.py
index 6d42b2b3..2a82db1d 100644
--- a/registrasion/views.py
+++ b/registrasion/views.py
@@ -185,6 +185,7 @@ def handle_products(request, category, products, prefix):
 
     return products_form, discounts, handled
 
+
 @transaction.atomic
 def set_quantities_from_products_form(products_form, current_cart):
     for product_id, quantity, field_name in products_form.product_quantities():
@@ -197,6 +198,7 @@ def set_quantities_from_products_form(products_form, current_cart):
         raise ValidationError("Cannot add that stuff")
     current_cart.end_batch()
 
+
 def handle_voucher(request, prefix):
     ''' Handles a voucher form in the given request. Returns the voucher
     form instance, and whether the voucher code was handled. '''
@@ -225,6 +227,7 @@ def handle_voucher(request, prefix):
 
     return (voucher_form, handled)
 
+
 @login_required
 def checkout(request):
     ''' Runs checkout for the current cart of items, ideally generating an