quantopian/zipline — pull request #331 by pankajn17 (2014-05-11 14:05:38+00:00)
Title: Use env_trading_calender for open and closes data

TradingEnvironment class uses env_trading_calendar for trading days but the default trading calendar for open_and_close data, which causes errors later, because of misalignment of trading days. The issue can be resolved by using env_trading_calendar for open_and_closes as well