Take namedtuple item names only from ascii_letters (this blew up on OSX),
and make sure there are no duplicate names.
diff --git a/Lib/test/test_collections.py b/Lib/test/test_collections.py
index 15f0bf7..a770155 100644
--- a/Lib/test/test_collections.py
+++ b/Lib/test/test_collections.py
@@ -110,7 +110,9 @@
n = 10000
import string, random
- names = [''.join([random.choice(string.letters) for j in range(10)]) for i in range(n)]
+ names = list(set(''.join([random.choice(string.ascii_letters)
+ for j in range(10)]) for i in range(n)))
+ n = len(names)
Big = namedtuple('Big', names)
b = Big(*range(n))
self.assertEqual(b, tuple(range(n)))