python-regexHow to use regex flags in Python?

Regex flags are used to modify the behavior of a regular expression search in Python. Flags can be specified in the re.compile() function using the re.IGNORECASE or re.I flag to ignore case when matching strings.

Example code

import re

pattern = re.compile(r'\w+', re.I)

string = 'Hello World'

match = pattern.search(string)

print(match.group())

Output example

Hello

Code explanation

• import re: imports the re module which contains the re.compile() function.
• pattern = re.compile(r'\w+', re.I): creates a regular expression pattern object using the re.compile() function and the re.I flag to ignore case when matching strings.
• string = 'Hello World': creates a string to search.
• match = pattern.search(string): searches the string for a match using the pattern object.
• print(match.group()): prints the matched string.

Helpful links

• Python Regular Expression Flags
• Python re Module

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