From 6c2d7ff395a7448bcc36629e83129d9dae740a34 Mon Sep 17 00:00:00 2001
From: Scott Sanderson <scoutoss@gmail.com>
Date: Tue, 25 Aug 2015 14:09:46 -0400
Subject: [PATCH] STY: Use same names in subclass.

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

diff --git a/zipline/modelling/engine.py b/zipline/modelling/engine.py
index 06f98e5d..1fc77720 100644
--- a/zipline/modelling/engine.py
+++ b/zipline/modelling/engine.py
@@ -149,10 +149,10 @@ class NoOpFFCEngine(FFCEngine):
     FFCEngine that doesn't do anything.
     """
 
-    def factor_matrix(self, terms, start, end):
+    def factor_matrix(self, terms, start_date, end_date):
         return DataFrame(
             index=MultiIndex.from_product(
-                [date_range(start=start, end=end, freq='D'), ()],
+                [date_range(start=start_date, end=end_date, freq='D'), ()],
             ),
             columns=sorted(terms.keys())
         )