Removed usage of a global variable.

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

from __future__ import unicode_literals

import os

import datetime

import itertools

import os

import tempfile

from django.core.files.storage import FileSystemStorage

from django.utils.encoding import python_2_unicode_compatible

callable_default_counter = itertools.count()

callable_default = lambda: next(callable_default_counter)

temp_storage_location = tempfile.mkdtemp(dir=os.environ['DJANGO_TEST_TEMP_DIR'])

temp_storage = FileSystemStorage(location=temp_storage_location)

    positive_integer = models.PositiveIntegerField(null=True, blank=True)

callable_default_value = 0

def callable_default():

    global callable_default_value

    callable_default_value = callable_default_value + 1

    return callable_default_value

class Defaults(models.Model):

    name = models.CharField(max_length=255, default='class default value')

    def_date = models.DateField(default=datetime.date(1980, 1, 1))