日期时间"现在没有属性"

Question

我想写一个简单的程序，用Python 3.4打印当前日期。在shell中，我可以导入datetime，并使用now()，但当我用类编写脚本时，它会失败并给出以下错误:

"AttributeError: module object has no attribute now". 

谁能帮我解释一下这个问题?这是我的代码:

import datetime
class Date:
    def __init__(self, filename):
        self.writeToFile(filename)
    def date(self):
        now = datetime.datetime.now()
        return now
    def writeToFile(self, filename):
        date = self.date()
        file = open(filename, 'w')
        file.write(date)
        for i in range(20):             # simply test for writting in file
            file.write(str(i)+'t')
        file.close()
        return file
d = Date('datetime.txt') 

Answer 1

import datetime
datetime.datetime.now()

Answer 2

确保您正在导入预期的datetime模块，并且它没有被同名的本地文件覆盖。你可以用:

import datetime
print(datetime.__file__)

并检查输出是否指向您想要的正确目录。

Answer 3

我也有这个错误，我所做的一切

Import datetime
from datetime import datetime
# then u can declare ur variable let's say something like
today = datetime.datetime.now()
#u can add what ever u want 
#the point is make sure u do the datetime.datetime.now()
print(today)