A typo in Database._create_query loses the exclude_tag names during the
string to utf-8 conversion.


The problem is fixed by this patch applied to current master (ced341e8):

diff --git i/bindings/python-cffi/notmuch2/_database.py w/bindings/python-cffi/notmuch2/_database.py
index 5ab0f20a..868f4408 100644
--- i/bindings/python-cffi/notmuch2/_database.py
+++ w/bindings/python-cffi/notmuch2/_database.py
@@ -581 +581 @@ class Database(base.NotmuchObject):
-                    tag = str.encode('utf-8')
+                    tag = tag.encode('utf-8')

-- 
johs (Johannes Larsen), (+47) 41435451