Python Function Reference

re.sub

Return the string obtained by replacing the leftmost non-overlapping occurrences of pattern in string by the replacement repl.

Python 3.13

re.sub(pattern, repl, string, count=0, flags=0)

pattern

The regular expression to search for.

repl

The replacement string or a function.

string

The source string.

count

The maximum number of substitutions (0 for all).

flags

Flags that modify the expression`s behavior.

Examples

Python 3.13

>>> import re
>>> re.sub(r'\s+', '-', 'hello world')
'hello-world'