typing fix for Python 3.9

heracles-ec · Dec 20, 2023 · 7172d7e · 7172d7e
1 parent b88daeb
commit 7172d7e
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/heracles/fields.py b/heracles/fields.py
@@ -43,7 +43,7 @@
 
 
 # type alias for column specification
-Columns = tuple[str | None, ...]
+Columns = tuple["str | None", ...]
 
 
 class Field(metaclass=ABCMeta):