python - 为什么我在 Django 中收到此错误？

Question

我有一个从应用程序导入 models.py 的脚本，但它不会导入!我不相信我应该手动创建一个“export DJANGO ...”环境变量...我做错了。

 Traceback (most recent call last):
      File "parse.py", line 8, in ?
        from butterfly.flower.models import Channel, Item
      File "/home/user/shri/butterfly/flower/models.py", line 1, in ?
        from django.db import models
      File "/usr/lib/python2.4/site-packages/django/db/__init__.py", line 10, in ?
        if not settings.DATABASE_ENGINE:
      File "/usr/lib/python2.4/site-packages/django/utils/functional.py", line 269, in __getattr__
        self._setup()
      File "/usr/lib/python2.4/site-packages/django/conf/__init__.py", line 38, 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.

Answer 1

您需要正确导入设置文件。如果您不首先导入 django 环境变量，您的导入将失败，正如您所注意到的。您需要编写如下代码:

import os# Set the DJANGO_SETTINGS_MODULE environment variable.os.environ['DJANGO_SETTINGS_MODULE'] = "myproject.settings"#do your stuff