s = s.strip()
m = re.match(
- r'(?i)(?:(?:(?P<hours>[0-9]+)\s*(?:[:h]|hours?)\s*)?(?P<mins>[0-9]+)\s*(?:[:m]|mins?|minutes?)\s*)?(?P<secs>[0-9]+)(?P<ms>\.[0-9]+)?\s*(?:s|secs?|seconds?)?$', s)
+ r'''(?ix)T?
+ (?:
+ (?:(?P<hours>[0-9]+)\s*(?:[:h]|hours?)\s*)?
+ (?P<mins>[0-9]+)\s*(?:[:m]|mins?|minutes?)\s*
+ )?
+ (?P<secs>[0-9]+)(?P<ms>\.[0-9]+)?\s*(?:s|secs?|seconds?)?$''', s)
if not m:
return None
res = int(m.group('secs'))