"AttributeError: type object 'IOLoop' has no attribute 'initialized' "问题解决办法

在anaconda下使用jupyter notebook运行虚拟环境时出现以下报错:
"AttributeError: type object 'IOLoop' has no attribute 'initialized' "问题解决办法

原因:

tornado版本过高,不支持jupyter notebook

解决办法

conda install tornado=4.5

如下成功运行:
"AttributeError: type object 'IOLoop' has no attribute 'initialized' "问题解决办法