def get_dir_from_zipfile(zip_file, fallback=None):
    """Return the name of the root folder in a zip file.

    :param zip_file: a :class:`zipfile.ZipFile` instance.
    :param fallback: if `None`, the name of the zip file is used. This is
        returned if the zip file contains more than one top-level directory,
        or none at all.
    """
    fallback = fallback or zip_file.filename
    directories = [name for name in zip_file.namelist() if name.endswith("/")
                   and len(PurePath(name).parts) == 1]
    return fallback if len(directories) > 1 else directories[0]
def _wait_for_license_pool_state_to_activate(self, pool):
        error_values = ['EXPIRED', 'FAILED']
        # Wait no more than 5 minutes
        for x in range(1, 30):
            pool.refresh()
            if pool.state == 'LICENSED':
                return True
            elif pool.state == 'WAITING_FOR_EULA_ACCEPTANCE':
                pool.modify(
                    eulaText=pool.eulaText,
                    state='ACCEPTED_EULA'
                )
            elif pool.state in error_values:
                raise F5ModuleError(pool.errorText)
            time.sleep(10)