From 22827d1c89a9b6caa6504c64ac996525e0d00fab Mon Sep 17 00:00:00 2001
From: Stewart Douglas <sdouglas@quantopian.com>
Date: Fri, 14 Aug 2015 18:49:56 -0400
Subject: [PATCH] MAINT: Convert map to list in lookup_future_chain

---
 zipline/assets/assets.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/zipline/assets/assets.py b/zipline/assets/assets.py
index 41750879..b06da9e8 100644
--- a/zipline/assets/assets.py
+++ b/zipline/assets/assets.py
@@ -427,7 +427,7 @@ class AssetFinder(object):
             if count == 0:
                 raise RootSymbolNotFound(root_symbol=root_symbol)
 
-        return map(self._retrieve_futures_contract, sids)
+        return list(map(self._retrieve_futures_contract, sids))
 
     @property
     def sids(self):