How to Remove HTML Tags from a String Using Python Regular Expressions?

String Replacement with Regular Expressions in Python

Question:

How can I replace HTML tags within a string using regular expressions in Python?

Inputs:

this is a paragraph with<[1]> in between</[1]> and then there are cases ... where the<[99]> number ranges from 1-100</[99]>.
and there are many other lines in the txt files
with<[3]> such tags </[3]>

Desired Output:

this is a paragraph with in between and then there are cases ... where the number ranges from 1-100.
and there are many other lines in the txt files
with such tags

Solution:

To replace multiple tags using regular expressions in Python, follow these steps:

import re

line = re.sub(r"<\/?\[\d+>]", "", line)

Explanation:

The regular expression r""] matches any tag that starts with <, followed by any number of digits, and ends with >. The question mark character ? after the / indicates that the slash is optional. The sub function replaces each match with an empty string.

Commented Version:

line = re.sub(r"""
  (?x) # Use free-spacing mode.
  <    # Match a literal '<'
  /?   # Optionally match a '/'
  \[   # Match a literal '['
  \d+  # Match one or more digits
  >    # Match a literal '>'
""", "", line)

Additional Notes:

• Regular expressions can be complex, so it's recommended to use a tool like www.regular-expressions.info to learn about syntax and test your expressions.
• Avoid hard-coding the number ranges to be replaced from 1 to 99.
• Understand the special characters in regular expressions known as metacharacters.

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