From 9021c955951c63ef3075b4751615af329427d3ec Mon Sep 17 00:00:00 2001
From: Raymond Hettinger <python@rcn.com>
Date: Sat, 5 Jun 2004 14:53:22 +0000
Subject: [PATCH] SF bug #964230:  random.choice([]) should return more
 intelligible exception

Add a comment to make the traceback less mysterious.
---
 Lib/random.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Lib/random.py b/Lib/random.py
index 58865fc59b9..92163bb6084 100644
--- a/Lib/random.py
+++ b/Lib/random.py
@@ -237,7 +237,7 @@ def _randbelow(self, n, _log=_log, int=int, _maxwidth=1L<<BPF,
 
     def choice(self, seq):
         """Choose a random element from a non-empty sequence."""
-        return seq[int(self.random() * len(seq))]
+        return seq[int(self.random() * len(seq))]  # raises IndexError in seq is empty
 
     def shuffle(self, x, random=None, int=int):
         """x, random=random.random -> shuffle list x in place; return None.