add TODO 'type consistent returns'

xlcnd · Jun 4, 2020 · d6c9e46 · d6c9e46
1 parent f959612
commit d6c9e46
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/isbnlib/_core.py b/isbnlib/_core.py
@@ -258,6 +258,7 @@ def get_canonical_isbn(isbnlike, output='bouth'):
     return None
 
 
+# TODO(make return type consistent)!
 def ean13(isbnlike):
     """Transform an `isbnlike` string in an EAN number (canonical ISBN-13)."""
     ib = canonical(isbnlike)