From 13ccf169f13d3c0844ddff043f3ae2c1ef3d3c30 Mon Sep 17 00:00:00 2001
From: fawce <fawce@quantopian.com>
Date: Mon, 28 May 2012 16:06:41 -0400
Subject: [PATCH] encoding epoch as an int, rather than float.

---
 zipline/utils/date_utils.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/zipline/utils/date_utils.py b/zipline/utils/date_utils.py
index 3ac53bdd..801315b8 100644
--- a/zipline/utils/date_utils.py
+++ b/zipline/utils/date_utils.py
@@ -44,10 +44,10 @@ def EPOCH(utc_datetime):
     delta = utc_datetime - UNIX_EPOCH
     seconds = delta.total_seconds()
     ms = seconds * 1000
-    return ms
+    return int(ms)
 
 def UN_EPOCH(ms_since_epoch):
-    seconds_since_epoch = ms_since_epoch / 1000
+    seconds_since_epoch = float(ms_since_epoch) / 1000.0
     delta = timedelta(seconds = seconds_since_epoch)
     dt = UNIX_EPOCH + delta
     return dt