match method try to match only from the start of the string
search method try to match from anywhere on the string

in my specific use case, word boundary (\b) doesn't work with match if the sub-string I looking for is in the middle of the string

>>> import re
>>> r = re.compile(rf"\babc\b")
>>> r.match("xxx abc yyy")  # doesn't work
>>> r.search("xxx abc yyy")  # work
<re.Match object; span=(4, 7), match='abc'>

a workaround can be found here (r = re.compile(fr"^.*\babc\b.*$")) but word boundary alone should work too

fixes #330