File "<stdin>", line 1, in <module>
File "/usr/local/lib/python2.6/dist-packages/django/db/__init__.py", line 14, in <module>
if not settings.DATABASES:
File "/usr/local/lib/python2.6/dist-packages/django/utils/functional.py", line 276, in __getattr__
self._setup()
File "/usr/local/lib/python2.6/dist-packages/django/conf/__init__.py", line 40, in _setup
raise ImportError("Settings cannot be imported, because environment variable %s is undefined." % ENVIRONMENT_VARIABLE)
ImportError: Settings cannot be imported, because environment variable DJANGO_SETTINGS_MODULE is undefined.
如何设置环境变量?