python-regexHow to make a case insensitive match with Python regex?

To make a case insensitive match with Python regex, use the re.IGNORECASE flag. This flag will cause the regex engine to ignore the case of the characters when matching.

Example code

import re

pattern = re.compile(r'[A-Z]+', re.IGNORECASE)

match = pattern.search('aBc')

print(match.group())

Output example

aBc

Code explanation

• import re: imports the re module which contains the regex engine
• re.compile(r'[A-Z]+', re.IGNORECASE): compiles the regex pattern [A-Z]+ with the re.IGNORECASE flag
• pattern.search('aBc'): searches the string aBc for the compiled regex pattern
• match.group(): prints the matched string

Helpful links

• Python Regular Expression Documentation

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