python - 名称错误 : name 'datetime' is not defined

Question

我正在自学 Python，只是在“探索”。 Google 说 datetime 是一个全局变量，但是当我尝试在终端中查找今天的日期时，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

您需要导入模块datetime第一:

>>> import datetime

之后就可以了:

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