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How to Retrieve Specific Content from a Regular Expression Match?

Mary-Kate Olsen

Oct 20, 2024 pm 12:13 PM

How to Retrieve Specific Content from a Regular Expression Match?

Retrieving Specific Content from a Regular Expression Match

When extracting information from HTML using regular expressions, you may encounter instances where you need to retrieve specific content within a match. This can be achieved using capture groups and indexed referencing.

Capturing Content with Parentheses

To capture a portion of a regular expression match, enclose it within parentheses ( ). This creates a capture group. For example, to capture just the contents of the

tags:<pre class="brush:php;toolbar:false">title_search = re.search('<title>(.*)</title>', html, re.IGNORECASE)</pre> Retrieving Captured Content After performing the search, you can retrieve the captured content using the group() method with an index corresponding to the capture group number (starting from 1). In this case, the title is captured by group 1: <pre class="brush:php;toolbar:false">if title_search: title = title_search.group(1)</pre> Eliminating the Need for String Manipulation This approach eliminates the need for additional steps to remove the <title> tags from the match. The captured content is directly retrieved, resulting in cleaner and more efficient code.

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