python-2.7 - How to use regex in Portia visual scrapy?

Question

I can able to annotate the web pages using Portia web crawler, my question is how can use the Regex while extracting the data.

For Example,

I have extracted Location filed from a page

Output looks like,

Location : Location xyz,abc

But I need only the xyz,abc values.

I have googled for solutions, but not getting more information.

Could you explain about regex in Portia scrapy?

Answer 1

您需要使用捕获组来提取数据，因此在这种情况下：

Location: (.*)

这告诉 portia 提取Location:字符串后面的所有数据。

例如，如果您只想提取 和 之间Location:的所有数据， ,您可以使用以下内容：

Location: (.*),

您还可以将信息放在捕获组中，以便提取直到并包括您的模式的所有数据。