import sys
import django

try:
    basestring
except:
    basestring = str  # Python3

PY2 = sys.version_info[0] == 2
if not PY2:
    text_type = str
    binary_type = bytes
    string_types = (str,)
    integer_types = (int,)
else:
    text_type = unicode
    binary_type = str
    string_types = basestring
    integer_types = (int, long)

if django.VERSION < (3, 0):
    from django.utils.lru_cache import lru_cache
else:
    from functools import lru_cache