def tags_getListUser(user_id=''):
    """Returns a list of tags for the given user (in string format)"""
    method = 'flickr.tags.getListUser'
    auth = user_id == ''
    data = _doget(method, auth=auth, user_id=user_id)
    if isinstance(data.rsp.tags.tag, list):
        return [tag.text for tag in data.rsp.tags.tag]
    else:
        return [data.rsp.tags.tag.text]