python-regexHow to replace using Python regex?

Python's re module provides a powerful set of tools for performing regular expression (regex) operations. To replace using Python regex, the re.sub() function can be used. This function takes three arguments: the pattern to search for, the replacement string, and the string to search in.

Example code

import re

text = "This is a test string"

new_text = re.sub(r"test", "sample", text)

print(new_text)

Output example

This is a sample string

Code explanation

• import re: imports the re module, which provides the tools for performing regex operations
• re.sub(r"test", "sample", text): searches for the pattern test in the string text and replaces it with sample
• print(new_text): prints the new string with the replaced pattern

Helpful links

• Python Regular Expressions
• re.sub()

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