'Returns an instance of the renderer.'

def get_renderer(self, name, value, attrs=None, choices=()):

    if (value is None):
        value = ''
    str_value = force_unicode(value)
    final_attrs = self.build_attrs(attrs)
    choices = list(chain(self.choices, choices))
    return self.renderer(name, str_value, final_attrs, choices)
