Generate a `SetFinishedEvent` object from a string

def from_str(string):
        """Generate a `SetFinishedEvent` object from a string
        """
        match = re.match(r'^UPDATE (.+)$', string)
        if match:
            parsed_date = dateutil.parser.parse(match.group(1), ignoretz=True)
            return UpdateEvent(parsed_date)
        else:
            raise EventParseError