Scrapy日期捕獲正則表達式

我有一個解析以下日期的工作正則表達式：Scrapy日期捕獲正則表達式

(?:(September|April|June|November) +(0?[1-9]|[12]\d|30), *((?:19|20)\d\d))|(?:(January|March|May|July|August|October|December) +(0?[1-9]|[12]\d|3[01]), *((?:19|20)\d\d))|(?:February +(?:(?:(0?[1-9]|1\d|2[0-8]), *((?:19|20)\d\d))|(?:(29), *((?:(?:19|20)(?:04|08|12|16|20|24|28|32|36|40|44|48|52|56|60|64|68|72|76|80|84|88|92|96))|2000))))

它解析以下字符串：

The owners of this address received a permit on Wednesday, July 31, 2014

項目的輸出scrapy是：

[u'June', u'31', u'2014', u'', u'', u'', u'', u'', u'', u'']

我想scrapy項目是：

[u'June 31, 2014']

這裏是我的scrapy代碼：

date_scrape = response.css('#ctl00_MasterDiv > div.Divwidth100 td.content_panel_middle > div > p:contains("The owners of this address") > b ::text') 

permit_date = date_scrape.re(r'(?:(September|April|June|November) +(0?[1-9]|[12]\d|30), *((?:19|20)\d\d))|(?:(January|March|May|July|August|October|December) +(0?[1-9]|[12]\d|3[01]), *((?:19|20)\d\d))|(?:February +(?:(?:(0?[1-9]|1\d|2[0-8]), *((?:19|20)\d\d))|(?:(29), *((?:(?:19|20)(?:04|08|12|16|20|24|28|32|36|40|44|48|52|56|60|64|68|72|76|80|84|88|92|96))|2000))))')

就如何解決這一問題有什麼想法？

來源

2014-09-02 dfriestedt

注 - 我已經嘗試添加^和$來表達我似乎無法弄清楚。我已經在regex101中測試了^和$的幾種可能的用法，它們都失敗了。 – dfriestedt 2014-09-02 13:29:00

import re 
s='The owners of this address received a permit on Wednesday, July 31, 2014' 

words = (re.findall(r'(\w+ \d+, \d+)',s)) 
print words

結果：

['July 31, 2014']

來源

2014-09-02 13:36:00 Kasramvd

我絕對浪費了很多時間，試圖弄清楚這一點。我在其他帖子中看到了這個解決方案，只是沒有嘗試。思想太「簡單」了。謝謝！ – dfriestedt 2014-09-02 13:45:27

我很高興！好的com – Kasramvd 2014-09-02 13:46:12

如果你不想潛入正則表達式的美妙世界，這裏有一個替代解決方案。

使用dateutil.parser.parse()與fuzzy=True。從scrapy shell演示：

$ scrapy shell index.html 
>>> text = response.xpath('//body/b/text()').extract()[0] 
>>> text 
u'The owners of this address received a permit on Wednesday, July 31, 2014' 

>>> from dateutil.parser import parse 
>>> parse(text, fuzzy=True) 
datetime.datetime(2014, 7, 31, 0, 0)

其中index.html包含HTML測試數據：

<body> 
    <b>The owners of this address received a permit on Wednesday, July 31, 2014</b> 
</body>

來源

2014-09-02 13:32:00 alecxe

Scrapy日期捕獲正則表達式

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