Can't get Jinja2 working with django 1.9 - django

Question

If I install as suggested in django 1.9 docs (https://docs.djangoproject.com/en/1.9/topics/templates/#django.template.backends.jinja2.Jinja2)
with two items in TEMPLATES, the first is the jinja2 backend, the second is the django backend:
TEMPLATES = [
{
'BACKEND': 'django.template.backends.jinja2.Jinja2',
'DIRS': [
PROJECT_ROOT+ "/templates/jinja",
],
'APP_DIRS' : True,
'OPTIONS': {
'environment': 'commshub.jinja2_settings.environment',
},
},
{
'BACKEND': 'django.template.backends.django.DjangoTemplates',
'DIRS': [
PROJECT_ROOT+ "/templates",
],
'OPTIONS': {
'debug': DEBUG,
'context_processors': [
"django.contrib.auth.context_processors.auth",
"django.core.context_processors.debug",
"django.core.context_processors.media",
'django.core.context_processors.request',
'django.core.context_processors.static',
'django.contrib.messages.context_processors.messages',
],
},
},
]
but WITHOUT 'environment' setting, then appears to work provided I remove also 'auto_reload' setting for both jinja and django, otherwise get
__init__() got an unexpected keyword argument 'auto_reload'
If I add myproj.jinja2.py with content as shown in django docs, still no 'environment' option, I get:
cannot import name Environment
If I change "from jinja2 import Environment" to ""from jinja2.environment import Environment"
No module named environment
In light of this post, https://groups.google.com/forum/#!msg/django-users/pytjLOVUwmM/gbiDmswSuq4J, I try renaming jinja2.py to jinja2_settings.py and add this TEMPLATE options:
'environment': 'jinja2_settings.environment', -> pop() takes no arguments (2 given)
'environment': 'myproj.jinja2_settings.environment', -> No module named commshub.jinja2_settings
Tried removing django backend altogether but got the same error as above.
Not sure what else to try!