Python3.4 datetime.today() and datetime.now() 有什么区别

Python 3.4.3 (v3.4.3:9b73f1c3e601, Feb 24 2015, 22:43:06) [MSC v.1600 32 bit (Intel)] on win32
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>>> import datetime
>>> datetime.datetime.today()
datetime.datetime(2015, 8, 30, 23, 17, 6, 937659)
>>> datetime.datetime.now()
datetime.datetime(2015, 8, 30, 23, 17, 14, 378097)
>>>

看上去似乎没区别啊

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这种时候请读文档

now()接收一个参数tz，也就是timezone时区，如果这个参数不存在时，它的表现等同于today()

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https://docs.python.org/3.4/library/datetime.html?highlight=datetime#module-datetime

classmethod datetime.now(tz=None)
Return the current local date and time. If optional argument tz is None or not
specified, this is like today()

这英语貌似不难。