NameError:未定义名称"datetime"

Question

我在教自己Python,只是在"探索".谷歌说datetime是一个全局变量但是当我试图在终端中找到今天的日期时,我在问题标题中收到NameError？

mynames-MacBook:pythonhard myname$ python
Enthought Canopy Python 2.7.3 | 64-bit | (default, Aug  8 2013, 05:37:06) 
[GCC 4.2.1 (Apple Inc. build 5666) (dot 3)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> date = datetime.date.today()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
NameError: name 'datetime' is not defined
>>> 

Answer 1

您需要先导入模块datetime:

>>> import datetime

之后它起作用:

>>> import datetime
>>> date = datetime.date.today()
>>> date
datetime.date(2013, 11, 12)

Answer 2

也可以如下使用：

from datetime import datetime
start_date = datetime(2016,3,1)
end_date = datetime(2016,3,10)