How regular expression modifiers work in Python?

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Regular expression literals may include an optional modifier to control different aspects of matching. The modifiers are specified as an optional flag. You can provide multiple modifiers using exclusive OR (|), and may be represented by one of these −

The following is a list of different re modifiers and their functions. 

1. re.I

Performs case-insensitive matching.

2. re.L

Interprets words according to the current locale. This interpretation affects the alphabetic group (\w and \W), as well as word boundary behavior(\b and \B).

3 re.M

Makes $ match the end of a line (not just the end of the string) and makes ^ match the start of any line (not just the start of the string).

4 re.S

Makes a period (dot) match any character, including a newline.

5 re.U

Interprets letters according to the Unicode character set. This flag affects the behavior of \w, \W, \b, \B.

6 re.X

Permits "cuter" regular expression syntax. It ignores whitespace (except inside a set [] or when escaped by a backslash) and treats unescaped # as a comment marker.

Updated on 30-Jul-2019 22:30:20