Fixed #24927 -- Used python_2_unicode_compatible from six

                type(self.obj))

def python_2_unicode_compatible(klass):

    """

    A decorator that defines __unicode__ and __str__ methods under Python 2.

    Under Python 3 it does nothing.

    To support Python 2 and 3 with a single code base, define a __str__ method

    returning text and apply this decorator to the class.

    """

    if six.PY2:

        if '__str__' not in klass.__dict__:

            raise ValueError("@python_2_unicode_compatible cannot be applied "

                             "to %s because it doesn't define __str__()." %

                             klass.__name__)

        klass.__unicode__ = klass.__str__

        klass.__str__ = lambda self: self.__unicode__().encode('utf-8')

    return klass

# For backwards compatibility. (originally in Django, then added to six 1.9)

python_2_unicode_compatible = six.python_2_unicode_compatible

def smart_text(s, encoding='utf-8', strings_only=False, errors='strict'):