如何使用正则表达式提取信息页面答案

【问题标题】：How to extract pages of information using regular expression如何使用正则表达式提取信息页面
【发布时间】：2015-09-28 17:21:27
【问题描述】：

我无法捕捉“name”的内容：他经常出现在“pluralName”之前。有什么更好的方法来做到这一点？（就性能而言的最佳方式）。感谢您的帮助！

注意：我使用的是python

包含我需要的信息的页面块：

{"count":0,"items":[]},"shortUrl":"http:\/\/4sq.com\/11nP13T","likes":{"count":22,"groups":[{"type":"others","count":22,"items":[]}],"summary":"22 Likes"},"ratingColor":"FF9600","id":"5172311be4b0ecc0a12a9953","canonicalPath":"\/v\/kee-hiong-klang-bak-kut-teh\/5172311be4b0ecc0a12a9953","canonicalUrl":"https:\/\/foursquare.com\/v\/kee-hiong-klang-bak-kut-teh\/5172311be4b0ecc0a12a9953","rating":5.3,"categories":[**{"pluralName":"Chinese Restaurants","name":"Chinese Restaurant",**"icon":{"prefix":"https:\/\/ss3.4sqi.net\/img\/categories_v2\/food\/asian_","mapPrefix":"https:\/\/ss3.4sqi.net\/img\/categories_map\/food\/chinese","suffix":".png"},"id":"4bf58dd8d48988d145941735","shortName":"Chinese","primary":true},{"pluralName":"Asian Restaurants","name":"Asian Restaurant","icon":{"prefix":"https:\/\/ss3.4sqi.net\/img\/categories_v2\/food\/asian_","mapPrefix":"https:\/\/ss3.4sqi.net\/img\/categories_map\/food\/asian","suffix":".png"},"id":"4bf58dd8d48988d142941735","shortName":"Asian"}],"createdAt":1366438171,"tips":{"count":25,"groups":[{"count":25,"items":[{"logView":true,"text":"Portion is quite small and expensive. Service attitude is so so. The BKT taste is not my preference.One of the up car restaurants in SS2 which I'll never go back again. ðŸ‘Ž","likes":{"count":1,"groups":[{"type":"others","count":1,"items":[{"photo":{"prefix":"https:\/\/irs0.4sqi.net\/img\/user\/","suffix":"\/43964080-5LYADRF2EEP2RWPL.jpg"},"lastName":".w","firstName":"Jackie","id":"43964080","canonicalPath":"\/user\/43964080","canonicalUrl":"https:\/\/foursquare.com\/user\/43964080","gender":"female"}]}],"summary":"1 like"},"id":"541c2b73498eb0cfe1f76b9e","canonicalPath":"\/item\/541c2b73498eb0cfe1f76b9e","canonicalUrl":"https:\/\/foursquare.com\/item\/541c2b73498eb0cfe1f76b9e","createdAt":1.411132275E9,"todo":{"count":0},"user":{"photo":{"prefix":"https:\/\/irs1.4sqi.net\/img\/user\/","suffix":"\/5765949-NW4BAJWFBCVLRR1M.jpg"}

【问题讨论】：

你需要精确匹配什么？
你能提供预期的输出吗
我想在这个例子中匹配“亚洲餐厅”，但是，我会跑到标签“名称”具有不同值的其他页面：

标签： python regex web-scraping

【解决方案1】：

(?:"pluralName":"[^"]*","name":"([^"]*))|(?:"name":"([^"]*)","pluralName")

用re.findall试试这个。查看演示。

https://regex101.com/r/hR7tH4/4

print re.findall(r'(?:"pluralName":"[^"]*","name":"([^"]*))|(?:"name":"([^"]*)","pluralName")',test_str)

【讨论】：

谢谢，有更多的结果作为输出，但使用这些结果更容易。

【解决方案2】：

根本不要使用正则表达式。

改为使用 JSON 解析器，并访问生成的对象。这更强大。

import json # part of python
o = json.loads(str)

【讨论】：

很好的答案！如果您展示如何使用o 的示例，可能会更清楚为什么这个答案更好。甚至可能在发布的问题的上下文中。
他分享的 JSON 片段是 FUBAR，损坏无法修复。