运行django报错doesn't declare an explicit app_label and isn't in an application in INSTALL_APPS

运行django服务时提示， 

XXX doesn't declare an explicit app_label and isn't in an application in INSTALL_APPS

 

原因：因为我在settings文件中添加了一行搜索路径 ，而使用pycharm自动引入时的路径并不正确

#apps为子应用目录
sys.path.insert(0,os.path.join(BASE_DIR,'apps'))

解决方法： 

from 项目同名包.子应用目录.子应用名称.models import model名

#改为下方的代码

from .models import model名