| 
 这种问题好多新手按照djangobook学习的时候应该都遇到过,是因为这是老的django的写法,新的django已经升级改变了很多东西。  
处理方法如下:  
I think you are not using the latest version of django-ajax-selects package.  
There was a related fix made in July 2014:  
 
Either run pip with an upgrade flag:  
pip install --upgrade django-ajax-selects
  
or, install it directly from github:  
git clone https://github.com/crucialfelix/django-ajax-selects.git
cd django-ajax-selects
python setup.py install  
According to a changeset, mimetype was replaced by content_type.  
就是先升级django-ajax-selects,然后把代码里边的mimetype换成content_type,就OK了。  
参考文档:  
   http://blog.csdn.net/changemyself/article/details/40043131  
  http://stackoverflow.com/questions/28758787/init-got-an-unexpected-keyword-argument-mimetype  
   |