Python 我的第一个Django cassandra代码中的一些错误

我想在pyCharm中运行我的第一个Django cassandra代码。 我的代码在Django控制台中运行顺利，但在.py文件中无法运行。以下是错误：

C:\Python27\python.exe "D:/Developer Center/PyCharm/DJangoCassandra/MyApp/testFile.py"
Traceback (most recent call last):
  File "D:/Developer Center/PyCharm/DJangoCassandra/MyApp/testFile.py", line 3, in <module>
    from MyApp.models import Person
  File "D:\Developer Center\PyCharm\DJangoCassandra\MyApp\models.py", line 1, in <module>
    from django.db import models
  File "C:\Python27\lib\site-packages\django\db\__init__.py", line 11, in <module>
    if settings.DATABASES and DEFAULT_DB_ALIAS not in settings.DATABASES:
  File "C:\Python27\lib\site-packages\django\conf\__init__.py", line 53, in __getattr__
    self._setup(name)
  File "C:\Python27\lib\site-packages\django\conf\__init__.py", line 46, in _setup
    % (desc, ENVIRONMENT_VARIABLE))
django.core.exceptions.ImproperlyConfigured: Requested setting DATABASES, but settings are not configured. You must either define the environment variable DJANGO_SETTINGS_MODULE or call settings.configure() before accessing settings.

Process finished with exit code 1

这是我的模型：

from django.db import models
from cqlengine import Model, columns
# Create your models here.

class Person(Model):
    id = columns.Text(primary_key=True)
    name = columns.Text()
    family = columns.Text()

---

如果在启动managy.py shell命令时编写以下行，则该命令应该可以工作：

import os
os.environ.setdefault("DJANGO_SETTINGS_MODULE", "zoo.settings")

---

不在.py文件中工作是什么意思？你是如何运行你的代码的？您遇到的错误是因为无法找到项目的settings.py文件。它在Django控制台中工作的原因是，当您运行manage.py shell时，默认情况下它知道在哪里查找settings.py

import os
os.environ.setdefault("DJANGO_SETTINGS_MODULE", "zoo.settings")