Do A Case Insensitive RexEx Search In Python

April 2021

Use the re.IGNORECASE flag to do case insenstive searches. For example, here's the same search with and without it:

import re

alfa  = re.search('test', 'TeSt')
bravo = re.search('test', 'TeSt', re.IGNORECASE)

print(alfa)
print(bravo)

Output:

None
<re.Match object; span=(0, 4), match='TeSt'>

Notes

When doing a .sub(), the flags key should be called explicietly like:

re.sub('test', 'TeSt', 'source value', flags=re.IGNORECASE)

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