Heroku push rejected (Django app) - django

Question

I'm deploying a Django app to GitHub and Heroku.
I have deployed it first to GitHub, removing (putting it in the .gitignore file) "settings.py", and now that I'm trying to push it to Heroku, I get an error:
ImportError: No module named settings
remote:
remote: ! Error while running '$ python manage.py collectstatic --noinput'.
remote: See traceback above for details.
remote:
remote: You may need to update application code to resolve this error.
remote: Or, you can disable collectstatic for this application:
remote:
remote: $ heroku config:set DISABLE_COLLECTSTATIC=1
remote:
remote: https://devcenter.heroku.com/articles/django-assets
remote:
remote: ! Push rejected, failed to compile Python app
How can I avoid to push some file to GitHub, but at the same having the possibility to pushing it to Heroku?
UPDATE:
I've tried to keep settings.py and temp_settings.py separate, but now the app doesn't work anymore. That's the traceback when I try to run the local server:
Traceback (most recent call last):
File "manage.py", line 10, in <module>
execute_from_command_line(sys.argv)
File "/home/stefano/projects/blog-project/blogprojectenv/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 338, in execute_from_command_line
utility.execute()
File "/home/stefano/projects/blog-project/blogprojectenv/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 303, in execute
settings.INSTALLED_APPS
File "/home/stefano/projects/blog-project/blogprojectenv/local/lib/python2.7/site-packages/django/conf/__init__.py", line 48, in __getattr__
self._setup(name)
File "/home/stefano/projects/blog-project/blogprojectenv/local/lib/python2.7/site-packages/django/conf/__init__.py", line 44, in _setup
self._wrapped = Settings(settings_module)
File "/home/stefano/projects/blog-project/blogprojectenv/local/lib/python2.7/site-packages/django/conf/__init__.py", line 92, in __init__
mod = importlib.import_module(self.SETTINGS_MODULE)
File "/usr/lib/python2.7/importlib/__init__.py", line 37, in import_module
__import__(name)
File "/home/stefano/projects/blog-project/blogproject/settings.py", line 104, in <module>
DATABASES['default'].update(db_from_env)
NameError: name 'DATABASES' is not defined
It seems settings.py can't "reach" temp_settings.py, as I've cut-paste all of the database settings in temp_settings. Is that wrong?

Answer 1

The common practice is not to ignore settings.py file from your code base. Instead, do something like:
try:
from temp_settings import *
except ImportError:
pass
at the end of settings.py file and add temp_settings.py to .gitignore
For the credentials that you need to keep private, use temp_settings.