problemas com python 3.5.2 e django 1.9

[FabianoAlmeidaMelo]

• ImportError: cannot import name 'smart_unicode'

.../formfields.py", line 4, in

File ".../formfields.py", line 5, in

• from widgets import BRDecimalWidget, PointWidget, BRFloatWidget
  ImportError: No module named 'widgets'
  Performing system checks...

[FabianoAlmeidaMelo]

# -*- coding: utf-8 -*-

from datetime import date

from django.forms import FloatField, DecimalField, MultiValueField, ValidationError

try:
    # python 2
    from django.utils.encoding import smart_unicode as smart_char
except:
    # python 3
    from django.utils.encoding import smart_str  as smart_char

try:
    # django < 1.9
    from widgets import BRDecimalWidget, PointWidget, BRFloatWidget
except:
    # django >= 1.9
    from localbr.widgets import BRDecimalWidget, PointWidget, BRFloatWidget

from django.forms.fields import EMPTY_VALUES
from django.utils.safestring import mark_safe
from django.forms.fields import Field
from django.contrib.gis.geos import Point
from localflavor.br import forms as lfbr_forms

import re