问题
when i input from django.db import models into IDLE,the result throw a exception named Settings cannot be imported, because environment variable DJANGO_SETTINGS_MODULE is undefined.
why does this exception occur and how i can fix it
回答1:
You can use python manage.py shell instead of using IDLE.
manage.py reads and uses django settings including DJANGO_SETTINGS_MODULE.
回答2:
Ensure, if not, follow the way to Quick Start:
Assumptions:
- You have installed python on
c:\i.e.,c:\python27 - You have installed Django 1.3 in same folder i.e.,
c:\python27
Step 1:
First you need to set system path for django-admin.py with:
set DJANGO_PATH="c:\python27\scripts"
so that you will able to run django-admin.py from anywhere where you want to create DJango project.
Step 2:
Now go to c:\python27\ and run following syntax to create test project:
django-admin.py startproject mysite
Here "mysite" is our project name, you can choose whatever you want.
Now you project is created you can check this in c:\python27\ in folder named mysite\
Step 3:
Now go to python shell at c:\python27
set environment variable "DJANGO_SETTINGS_MODULE" with:
>>> import os
>>> os.environ['DJANGO_SETTINGS_MODULE']='mysite.settings'
Here " mysite " is project name which we created in step 2.
All basic setups are done now you can run your command
from django.db import models<br>
If problem still persist please review all steps or reply me.
回答3:
Don't run django-admin.py for anything other than the initial project creation. For everything after that, use manage.py, which takes care of the finding the settings.
回答4:
It occurred because you forgot to supply the Django project settings. You can fix it by supplying them.
来源：https://stackoverflow.com/questions/7479493/django-settings-module-is-undefined