fix relative import bug

.gitignore

@@ -9,6 +9,7 @@ __pycache__/
 .Python
 .venv
 env/
+tests/.env/
 bin/
 build/
 develop-eggs/

resize/templatetags/resize.py

@@ -1,12 +1,14 @@
 
+from __future__ import absolute_import, print_function, unicode_literals
+
 import logging
 
 from django.conf import settings
 from django.template import Library
 from django.contrib.sites.models import Site
 from django.contrib.staticfiles.finders import find as find_file
 
-from resize.utils import resize_image, get_new_size, calc_height, calc_width
+from resize.utils import resize_image, calc_height, calc_width
 
 logger = logging.getLogger(__name__)