'Return only select options.'

def options(self, name, value, attrs=None):

    if isinstance(value, six.text_type):
        value = value.split(',')
    for v in value:
        if (not v):
            continue
        real_values = (v.split(',') if hasattr(v, 'split') else v)
        for rv in real_values:
            (yield self.option_value(rv))
