Python -使用datetime的同一行代码在一个文件中失败，但在另一个文件中不会失败

Question

我在项目A中有以下代码行

#filename : mod_dates
#Handles date calculations etc
import datetime
class datecalcs:
    def __init__(self):
        self.__menuChoice = 0
        self.__datemonth = "not set"
        self.__effectivedate = ""
        self.__year = 0
        self.__month = 0
        return None
#
    def interestcouponpaydates(self,effectivedate,couponday):
        self.__effectivedate = effectivedate

        year, month, day = map(int,self.__effectivedate.split('-'))
        print(year)
        print(month)
        return self.__effectivedate

当我用

从另一个文件调用它们时

import mod_dates
import datetime
import modcalinputs
datesclass = mod_dates.datecalcs()
calcInputs = modcalinputs.calcinputs()
#Get the coupon date
interestdateeffective = calcInputs.interestdateffective()
interestdatecoupon = calcInputs.interestdatecoupon()

x =     datesclass.interestcouponpaydates(interestdateeffective,interestdatecoupon)
print(x)

但是这会在

的x = datesclass...行返回一个错误

year, month, day = map(int,self.__effectivedate.split('-'))

提出:

> AttributeError: 'datetime.date' object has no attribute 'split'

当我用相同的语法从一个类似的项目运行到同一行时，它工作得很好。对我做错了什么有什么想法吗?

Answer 1

看起来像是在分配日期时间。Date对象为__effecvedate。你不能在上面调用split()

>>> import date
>>> d = d = datetime.date(2012,3,12)
>>> d.split('-')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: 'datetime.date' object has no attribute 'split' 

您可以将其转换为字符串并拆分:

>>>str(d).split('-')
['2012', '03', '12']