相关疑难解决方法(0)

这是我的Transaction班级:

class Transaction(object):
    def __init__(self, company, num, price, date, is_buy):
        self.company = company
        self.num = num
        self.price = price
        self.date = datetime.strptime(date, "%Y-%m-%d")
        self.is_buy = is_buy

当我试图运行该date功能时:

tr = Transaction('AAPL', 600, '2013-10-25')
print tr.date

我收到以下错误:

   self.date = datetime.strptime(self.d, "%Y-%m-%d")
 AttributeError: 'module' object has no attribute 'strptime'

我该如何解决这个问题？

嗨我想在matplotlib中将日期列表转换为字符串到x轴,我似乎无法让它出来正确.

dates =  ['2014-05-06', '2014-05-07', '2014-05-08', '2014-05-09', '2014-05-10', '2014-05-11', '2014-05-12', '2014-05-13']

import matplotlib
from matplotlib import pyplot
from matplotlib import dates

converted_dates = matplotlib.dates.datestr2num(dates)
x_axis = (converted_dates)

y_axis = range(0,8)
pyplot.plot( x_axis, y_axis, '-' )
pyplot.show()

这会在图表的x轴上带回1 2 3 4 5 6 7,我错过了什么.我希望这能显示2014-05-06等