python理解人类友好的(简单的英语)日期规范

Question

是否存在与datetime集成并理解人性化日期规范格式的现有Python包，有点类似于/usr/bin/date在GNU Linux上的做法?

$ date -d 'today'
Thu May 28 14:01:15 XXX 2015
$ date -d 'tomorrow'
Fri May 29 14:01:23 XXX 2015
$ date -d 'this Sunday'
Sun May 31 00:00:00 XXX 2015
$ date -d 'Wednesday next week'
Wed Jun 10 00:00:00 XXX 2015

Answer 1

parsedatetime可能有帮助:

import datetime as DT
import parsedatetime as pdt
p = pdt.Calendar()
for text in ('today', 'tomorrow', 'this Sunday', 'Wednesday next week', 'next week Wednesday', ):
    timetuple, flag = p.parse(text)
    date = DT.datetime(*timetuple[:6])
    print('{:20} --> {}'.format(text, date))

收益率

today                --> 2015-05-28 09:00:00
tomorrow             --> 2015-05-29 09:00:00
this Sunday          --> 2015-05-31 09:13:46
Wednesday next week  --> 2015-06-01 09:00:00
next week Wednesday  --> 2015-06-03 09:00:00

但是注意Wednesday next week被错误地解析了

Answer 2

python-dateutil是另一个PyPI库，用于模糊匹配和输入。

我个人使用delorean，它具有你提到的那种自然语言特征，例如:

>>> d.last_tuesday()
Delorean(datetime=2013-01-15 19:41:06.207481+00:00, timezone=UTC)