bpo-44676: Serialize the union type using only public API (GH-27323) (GH-27340)
Remove also the _from_args() constructor.
(cherry picked from commit 435a0334d341e5f8faed594d9f015746bb7845db)
Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
diff --git a/Lib/typing.py b/Lib/typing.py
index 0570b4e..ae31589 100644
--- a/Lib/typing.py
+++ b/Lib/typing.py
@@ -321,7 +321,7 @@ def _eval_type(t, globalns, localns, recursive_guard=frozenset()):
if isinstance(t, GenericAlias):
return GenericAlias(t.__origin__, ev_args)
if isinstance(t, types.Union):
- return types.Union._from_args(ev_args)
+ return functools.reduce(operator.or_, ev_args)
else:
return t.copy_with(ev_args)
return t
@@ -1806,7 +1806,7 @@ def _strip_annotations(t):
stripped_args = tuple(_strip_annotations(a) for a in t.__args__)
if stripped_args == t.__args__:
return t
- return types.Union._from_args(stripped_args)
+ return functools.reduce(operator.or_, stripped_args)
return t