From a729f4abb8a3b13b63d46c450faf64202751449b Mon Sep 17 00:00:00 2001
From: "Miss Islington (bot)"
 <31488909+miss-islington@users.noreply.github.com>
Date: Mon, 25 May 2020 22:00:31 -0700
Subject: Simplify creation of the __new__ method in namedtuple() (GH-20361)
 (GH-20409)

---
 Lib/collections/__init__.py | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/Lib/collections/__init__.py b/Lib/collections/__init__.py
index c4bff59..011a0c1 100644
--- a/Lib/collections/__init__.py
+++ b/Lib/collections/__init__.py
@@ -406,11 +406,9 @@ def namedtuple(typename, field_names, *, rename=False, defaults=None, module=Non
 
     # Create all the named tuple methods to be added to the class namespace
 
-    s = f'def __new__(_cls, {arg_list}): return _tuple_new(_cls, ({arg_list}))'
+    s = f'lambda _cls, {arg_list}: _tuple_new(_cls, ({arg_list}))'
     namespace = {'_tuple_new': tuple_new, '__name__': f'namedtuple_{typename}'}
-    # Note: exec() has the side-effect of interning the field names
-    exec(s, namespace)
-    __new__ = namespace['__new__']
+    __new__ = eval(s, namespace)
     __new__.__doc__ = f'Create new instance of {typename}({arg_list})'
     if defaults is not None:
         __new__.__defaults__ = defaults
-- 
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