code cleanup

bookwyrm/views/books/edit_book.py

@@ -1,6 +1,6 @@
 """ the good stuff! the books! """
-from dateutil.parser import parse as dateparse
 from re import sub
+from dateutil.parser import parse as dateparse
 from django.contrib.auth.decorators import login_required, permission_required
 from django.contrib.postgres.search import SearchRank, SearchVector
 from django.db import transaction
@@ -75,7 +75,7 @@ class EditBook(View):
                     i
                     for i in isni_authors
                     for a in author_matches
-                    if sub("\D","",str(i["isni"])) == sub("\D","",str(a.isni))
+                    if sub(r"\D", "", str(i["isni"])) == sub(r"\D", "", str(a.isni))
                 ]
 
                 # pylint: disable=cell-var-from-loop