regex.replace

regex.replace(string, pattern, replacement, count:=0)

Return a string with all non-overlapping matches of pattern replaced by replacement. If count is non-zero, then count number of replacements are made, unless fewer replacements are required in the string.

The regex.replace function has the same semantics as Python re.sub. See https://docs.python.org/3/library/re.html#re.sub although note that the parameter order is different.