My point is that re.match is a common bug when people really want re.search.

re.prefixmatch makes it explicit and non-confusing and thus unlikely to be used wrong or misunderstood when read or reviewed.

The term "match" when talking about regular expressions is not normally meant to imply any anchoring as anchors can be expressed within the regex.  Python is relatively unique in bothering to have different methods for a prefix match and an anywhere match.  (We'd have been better off without a match method entirely, only having search - too late now)