Fix flake8 warning

diff --git a/drafthorse/models/container.py b/drafthorse/models/container.py
index 58f073dbf74d54768b1d8f5a3c33355f226067fc..981fb444bb77706ca16ecb12b0203bf89685fb0a 100644 (file)
--- a/drafthorse/models/container.py
+++ b/drafthorse/models/container.py
@@ -35,10 +35,10 @@ class SimpleContainer(Container):
         return '{%s}%s' % (self.namespace, self.tag)
 
     def empty_element(self):
-        raise NotImplemented()
+        raise NotImplementedError()
 
     def set_element(self, el, child):
-        raise NotImplemented()
+        raise NotImplementedError()
 
     def append_to(self, node):
         for child in self.children: