From acc49ef9aa5bd47779726e9cc05a9575151695b1 Mon Sep 17 00:00:00 2001
From: Jeremy Blow <jeremy@incerasolutions.com>
Date: Thu, 2 Jun 2016 11:05:53 -0700
Subject: [PATCH] BUG: Don't delete namespace if import fails.

datashape should be optional, this ensures it is actually optional.
---
 zipline/dispatch.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/zipline/dispatch.py b/zipline/dispatch.py
index 03c8d5f7..0c6f04dd 100644
--- a/zipline/dispatch.py
+++ b/zipline/dispatch.py
@@ -13,9 +13,9 @@ except ImportError:
     pass
 else:
     globals().update(namespace)
+    del namespace
 
 dispatch = partial(dispatch, namespace=globals())
 
-del namespace
 del partial
 del sys