Add a comment discussing reasons for __classcell__ manipulation

johnslavik · AlexWaygood · web-flow · commit 998474d3cc78 · 2025-01-29T13:30:11.000+01:00
Co-authored-by: Alex Waygood &lt;Alex.Waygood@Gmail.com&gt;
diff --git a/Lib/collections/__init__.py b/Lib/collections/__init__.py
@@ -488,6 +488,8 @@ def __getnewargs__(self):
         '__match_args__': field_names,
     }
 
+    # gh-85795: `super()` calls inside `typing.NamedTuple` methods will not
+    # work unless `__classcell__` is propagated by `collections._namedtuple`
     if classcell is not _nmtuple_classcell_sentinel:
         class_namespace["__classcell__"] = classcell
 

Original file line number	Diff line number	Diff line change
`@@ -488,6 +488,8 @@ def __getnewargs__(self):`
`488`	`488`	`'__match_args__': field_names,`
`489`	`489`	`}`
`490`	`490`
	`491`	+ # gh-85795: `super()` calls inside `typing.NamedTuple` methods will not
	`492`	+ # work unless `__classcell__` is propagated by `collections._namedtuple`
`491`	`493`	`if classcell is not _nmtuple_classcell_sentinel:`
`492`	`494`	`class_namespace["__classcell__"] = classcell`
`493`	`495`