在shell窗口输入 import viewclass.models as models 来引入模块，结果报错：
django.core.exceptions.ImproperlyConfigured: Requested setting LOGGING_CONFIG, but settings are not configured. You must either define the environment variable DJANGO_SETTINGS_MODULE or call settings.configure() before accessing settings.
解决：
1.输入
python manage.py shell |
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2.然后
import viewclass.models as models |
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