哪位大神帮忙看看，这是出了什么问题，怎么运行不了，还抛异常！

Question

from matplotlib.finance import quotes_historical_yahoo_ochl from datetime import date import pandas as pd today = date.today() start = (today.year-2, today.month, today.dat) quotes = quotes_historical_yahoo_ochl('MSFT', start, today) attributes = ['date','open','close','high','low','volume'] quotesdf = pd.DataFrame(quotes, columns = attributes) list1 = [] for i in range(0, len(quotes)):     x = date.fromordinal(int(quotes[i][0]))     y = date.strftime(x, '%Y/%m/%d') list1.append(y) quotesdf.index = list1 quotesdf = quotesdf.drop(['date'], axis = 1 ) quotesdf.ix['14/01/30':'14/02/10',['open', 'close']] quotesdf['14/01/01':'15/01/01'].sort('close', ascending=False)[0:5] list1 = [] tmpdf = quotesdf['15/01/01':'15/12/31'] for i in range(0, len(tmpdf)):     list1.append(int(tmpdf.index[i][3:5])) tmpdf['month'] = list1 print tmpdf[ tmpdf.close > tmpdf.open]['month'].value_counts()