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Getting the position of a tag in Beautiful Soup

Programming
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Python
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Beautiful Soup
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Tag Cookbook
schedule Jul 1, 2022
Last updated
local_offer PythonBeautiful Soup
Tags
tocTable of Contents
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BeautifulSoup gives us the following two positional information about a tag:

  • line number, which is accessed using the sourceline property

  • starting index of the tag in the line, which is using the sourcepos property

Example

Consider the following HTML document:

my_html = """
   <p>Alex is 5years old</p>
   <p id="bob">Bob is <b>10</b> years old</p>
   <p>Cathy is 15 years old</p>
"""
soup = BeautifulSoup(my_html, "html.parser")

To get the line number and the starting index of Bob's age tag, <b>10</b>:

age_tag = soup.find(id="bob").find("b")
print("Line number:", age_tag.sourceline)
print("Starting index:", age_tag.sourcepos)
Line number: 3
Starting index: 25

Note the following:

  • We get a 3 for the line number instead of a 2 because we've added a line break after """ in the HTML document.

  • The starting index 25 means that there is a total of 25 characters that come before the b tag.

WARNING

This only works when you're using either "html.parser" or "html5lib" for the parser.

robocat
Published by Isshin Inada
Edited by 0 others
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