'Change the font family.  May be either an alias (generic name
is CSS parlance), such as: \'serif\', \'sans-serif\', \'cursive\',
\'fantasy\', or \'monospace\', a real font name or a list of real
font names.  Real font names are not supported when
`text.usetex` is `True`.'

def set_family(self, family):

    if (family is None):
        family = rcParams[u'font.family']
    self._family = _normalize_font_family(family)
