Regex in Python 3.10

Sure! Regular expressions, or regex, is a powerful tool used in programming to search, manipulate and validate strings. In Python 3.10, we can use the re module to work with regular expressions.

Here's an example of how to use regex in Python 3.10:

import re
# Search for a pattern in a string

string = "Hello, World!"

pattern = "World"

matches = re.search(pattern, string)

print(matches.group()) # Output: World
# Find all occurrences of a pattern in a string

string = "The quick brown fox jumps over the lazy dog."

pattern = "the"

matches = re.findall(pattern, string, re.IGNORECASE)

print(matches) # Output: ['the', 'the']
# Replace a pattern in a string

string = "The quick brown fox jumps over the lazy dog."

pattern = "fox"

replacement = "cat"

new_string = re.sub(pattern, replacement, string)

print(new_string) # Output: The quick brown cat jumps over the lazy dog.
# Validate a string

string = "example@gmail.com"

pattern = r"\b[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Z|a-z]{2,}\b"

is_valid = re.match(pattern, string)

if is_valid:

  print("Valid email") # Output: Valid email

else:

  print("Invalid email")

As you can see in the examples above, regex can be powerful tool for working with strings in Python. It offers a lot of flexibility and can be used for a wide range of tasks.