From 99680138852c4ab91688e327f7780b77e348a77c Mon Sep 17 00:00:00 2001
From: Mahmoud Hashemi <mahmoud@hatnote.com>
Date: Fri, 10 Apr 2015 14:42:34 -0700
Subject: [PATCH] independent listutils + Python 3 support

---
 boltons/listutils.py | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/boltons/listutils.py b/boltons/listutils.py
index 028944d..ce914c6 100644
--- a/boltons/listutils.py
+++ b/boltons/listutils.py
@@ -15,9 +15,17 @@ import operator
 from math import log as math_log
 from itertools import chain, islice
 
-from .compat import make_sentinel, xrange
-_MISSING = make_sentinel(var_name='_MISSING')
+try:
+    from compat import make_sentinel
+    _MISSING = make_sentinel(var_name='_MISSING')
+except ImportError:
+    _MISSING = object()
 
+try:
+    xrange
+except NameError:
+    # Python 3 compat
+    xrange = range
 
 # TODO: expose splaylist?
 __all__ = ['BList', 'BarrelList']