added missing import

This commit is contained in:
fawce
2012-05-16 12:08:18 -04:00
parent 750496fa94
commit 2bf9f896e5
+1
View File
@@ -1,4 +1,5 @@
from collections import defaultdict
from datetime import timedelta
from zipline.transforms.base import BaseTransform
from zipline.finance.movingaverage import EventWindow