@classmethod
def prettyname(cls, attrib_name):
    """
        Returns the "pretty name" (capitalized, etc) of an attribute, by
        looking it up in ``cls.COLUMN_NAMES`` if it exists there.

        :param attrib_name: An attribute name.
        :type attrib_name: ``str``

        :rtype: ``str``
        """
    if attrib_name.startswith('tags.'):
        tagname = attrib_name[len('tags.'):]
        return '{} (tag)'.format(tagname)
    elif attrib_name in cls.COLUMN_NAMES:
        return cls.COLUMN_NAMES[attrib_name]
    else:
        return attrib_name
