Issue 21832: Require named tuple inputs to be exact strings
diff --git a/Lib/collections/__init__.py b/Lib/collections/__init__.py
index d6deb6a..d993fe0 100644
--- a/Lib/collections/__init__.py
+++ b/Lib/collections/__init__.py
@@ -323,6 +323,7 @@
if isinstance(field_names, str):
field_names = field_names.replace(',', ' ').split()
field_names = list(map(str, field_names))
+ typename = str(typename)
if rename:
seen = set()
for index, name in enumerate(field_names):
@@ -333,6 +334,8 @@
field_names[index] = '_%d' % index
seen.add(name)
for name in [typename] + field_names:
+ if type(name) != str:
+ raise TypeError('Type names and field names must be strings')
if not name.isidentifier():
raise ValueError('Type names and field names must be valid '
'identifiers: %r' % name)