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Cannot import module in Django project

My Django project directory looks like this :
I can import from the CPRS_admin app folder to my main folder and it works fine.But the moment I import the CPRS_admin app folder to the recommendation_model app folder it shows the error ModuleNotFound.
This is the image of the import of CPRS_admin into CPRS and it works.
But the moment when I import CPRS_admin into a file under the recommendation_model app it shows this error.

You need to add CPRS_admin to CPRS/settings.py
INSTALLED_APPS = ['CPRS_admin',...]

Have you added CPRS_admin to installed apps in settings.py?

Django - app in subfolder

I've created new django app in a subdirectory using the command:
python manage.py startapp appName subFolder/appName
but if I try to add this app to INSTALLED_APPS at the end of the list I see the following error:
ImportError: No module named appName
Does anyone know what I am doing wrong?

You need to include the subfolder when you add the app to INSTALLED_APPS, for example:
'subFolder.appName',
or
'subfolder.appName.apps.AppNameConfig',

I tried different options but no one can solve that issue.
Finally, I found a solution.
Simply go to the subFolder/appName/app.py file and
replace this line name = 'appname' with name = 'subfolder.appname'
And then you can simply add to the installed apps list.
'subfolder.appname'

importing from another folder in virtualenv

I'm following the Flask Mega Tutorial, and I'm running into an issue once I get to the second part and restructure my folder structure to match theirs, I cannot import Flask.
My current folder structure is as follows
/FlaskTest
/app
/static, templates etc
/flask
/virtualenv folders etc
/tmp
run.py
as far as I can tell, the folder structures are identical other than naming of the top level directory.
in my __init__.py file (/app/__init__.py), I'm doing as instructed in the tutorial,
from flask import Flask
app = Flask(__name__)
from app import views
I'm getting an Import Error that "cannot import name 'Flask'". I'm guessing the issue is because the flask package was installed to /flask/lib/site-packages.
My question: How can I reference the sub folder of flask/site-packages?
I've read through the python import system documentation and from what I can make of it through the first pass of reading it over, I would need to likely do something like from flask import flask.Flask or something to that effect.
UPDATE: So after cd'ing around the directory and checking pip list, I realized that flask wasn't accessible to my app directory. I ran pip install flask in the app directory. Now my site runs, but I'm not sure if this is the best practice of doing things with Python. Please provide some clarity as what the best practice is for installing packages and where the packages reside.
UPDATE 2: After creating a directory called standalone. In this folder, I created a virtual environment called standalone-test. Once, I did that, I also mkdir'ed app and copied it's contents from FlaskTest so that way the code would be identical. I was able to run the run.py script by using python run.py, but I can't run python -m app like you had said without running into an error. The error is as follows if it helps.
"No module name app.main; 'app' is a package and cannot be directly executed.
I am able to run python run.py as I mentioned, but I'm not able to run the python -m app command as you had mentioned

I think something went wrong in your execution environment. Here are some explanations.
The virtualenv
See the documentation of virtualenv
If you have followed the tutorial:
The flask directory is your virtualenv,
On posix system, you have a flask/bin subdirectory, or
On Windows system, you have a flask\Scripts subdirectory.
I make the assumption that you are on posix system.
To activate your virtualenv, run:
source flask/bin/activate
Your prompt should change to something like: (flask)$.
To list the installed libraries use pip:
pip list
Make sure you see Flask. The tutorial encourages you to install a lot of Flask plugins, so there are a lot of Flask-Something…
If Flask is missing, install it:
pip install Flask
Run your app
Your application is in the app directory, it has an __init__.py file (it's a Python package).
In this file, you have:
from flask import Flask
app = Flask(__name__)
from app import views
From your FlaskTest/ directory, try to run this script like this:
cd FlaskTest/ # if not in this directory
python -m app
This should import Flask, instanciate your app (but don't run it), import the views module.
If app/views.py exist you should have no error.
=> at this point, we have simulated what run.py imports…
Now write run.py in your FlaskTest/ directory:
#!flask/bin/python
from app import app
app.run(debug=True)
Run it like this:
python run.py
Note that the shebang #!flask/bin/python is unusual, but should work in the context of the tutorial.
This should start your http server…

Adding libraries to Google App Engine Projects

I've been trying to add Markdown2 library to my GAE app but it keeps throwing an ImportError. This is what I have:
sys.path.append(os.path.join(os.path.dirname(__file__), "lib\markdown2")
if I now do
html = markdown2.markdown("*boo*") #throws an error: markdown2 not defined

You need to add the lib directory to your path, not the markdown directory - markdown is a package, defined by the directory it's in.
This should work:
sys.path.append(os.path.join(os.path.dirname(__file__), 'lib'))

I use markdown2 with a simple import :
import lib.markdown

I don't think that's one of the standard libraries.
You'll need to include a copy of it inside your app folder - otherwise it won't be available when you deploy.
You shouldn't need to modify the path after that just import it with the correct path relative to your app's root folder.
for example:
if your app is at
/home/myapp
you might want to copy your markdown2 to
/home/myapp/lib/markdown2
in which case you'd use "import lib.markdown2".

Django settings.py Error: Import by filename is not supported

I am running Django in a virtual environment (using virtualenv), and I'm trying to add a custom development environment settings file to simplify app configuration when I'm developing. My plan was to do this with two lines of code
if os.environ.get('DEVELOPMENT', None):
from login import settings_dev
I've also tried import settings_def and from login.settings_dev import *. My settings_dev.py file is sitting in the same directory as my settings.py file and my app is sitting in a folder called login. When I run python login/manage.py syncdb I get this error:
Error: Import by filename is not supported.
My searching keeps bringing up DJANGO_SETTINGS_MODULE (though I'm not sure how it plays into all this - first Django app :]), so just an FYI it is set in my settings.py file like so:
os.environ['DJANGO_SETTINGS_MODULE'] = 'login.settings'
I've also tried exporting it in my terminal, but I get the same error.
Does anyone know how I can fix this/what I'm doing wrong here?

Make sure while passing relative address of file to use "." instead of "/".
I faced the same error what I actually did
"music/urls"
But it should be
"music.urls"

In the original settings.py, at the very end:
try:
from settings_dev import *
except ImportError:
pass
Create settings_dev.py in the same directory as settings.py, and in it, add these two lines at the very top:
import sys
globals().update(vars(sys.modules['settings']))
Now add whatever development settings you want in this file.

I had similar error in runserver command execution and finally I've found that this error raises because of python version incompatibility by the django version installed. There is two versions of python on my system and I had running django server by the wrong one. Hope it could be helpful to someone.