Regular expressions in Python can be used with the re module. To use regular expressions in Python, you must first import the re module:

import re

Once imported, you can create a regular expression object with the re.compile() function. This object can then be used to match strings or search for patterns using the re.match() and re.search() functions.

For example, to match a string with a regular expression, you can use the re.match() function:

match = re.match(r”Hello [A-Z]w+”, „Hello World”)

The above code will match the string „Hello World” with the regular expression „Hello [A-Z]w+”.

You can also use the re.search() function to search for patterns in a string:

search = re.search(r”d+”, „The number is 42”)

The above code will search for a pattern of one or more digits in the string „The number is 42”.