def coerce(cls, string):
        """Create a :class:`Requirement` object from a given package spec."""
        match = re.match(cls.spec_regex, string)
        if not match:
            raise InvalidRequirementSpecError("could not parse requirement")
        package = match.group(1)
        if all(match.group(2, 3)):
            version = "".join(match.group(2, 3))
        else:
            version = None
        return cls(package, version)
def _Delete(self):
    """Delete the log group."""
    delete_cmd = util.AWS_PREFIX + [
        '--region', self.region,
        'logs', 'delete-log-group',
        '--log-group-name', self.name
    ]
    vm_util.IssueCommand(delete_cmd, raise_on_failure=False)