transform working in parent process

backtest/util.py

@@ -2,6 +2,9 @@
 Small classes to assist with db access, timezone calculations, and so on.
 """
 
+import datetime
+import pytz
+
 class DocWrap():
     """
         Provides attribute access style on top of dictionary results from pymongo. 
@@ -38,7 +41,8 @@ def parse_date(dt_str):
     """parse strings according to the same format as generated by format_date"""
     if(dt_str == None):
         return None
-    dt = datetime.datetime.strptime(dt_str(".")[0], '%Y/%m/%d-%H:%M:%S').replace(microsecond=int(dt_str(".")[1]+"000")).replace(tzinfo = pytz.utc)
+    parts = dt_str.split(".")
+    dt = datetime.datetime.strptime(parts[0], '%Y/%m/%d-%H:%M:%S').replace(microsecond=int(parts[1]+"000")).replace(tzinfo = pytz.utc)
     return dt
     
 def format_date(dt):