Use "open" instead of "file".
Use "open" instead of "file".

"file" is not supported in Python 3.
bharling/django-cacheback,mitchelljkotler/django-cacheback,jayfk/django-cacheback,michaelkuty/django-cacheback,bpeschier/django-cacheback,bharling/django-cacheback,bpeschier/django-cacheback,codeinthehole/django-cacheback,codeinthehole/django-cacheback,bharling/django-cacheback,jayfk/django-cacheback,mitchelljkotler/django-cacheback,safarijv/django-cacheback,safarijv/django-cacheback,jayfk/django-cacheback,michaelkuty/django-cacheback,michaelkuty/django-cacheback,codeinthehole/django-cacheback,bpeschier/django-cacheback,safarijv/django-cacheback,mitchelljkotler/django-cacheback