解决spyder、Jupyter Notebook 打不开

参考：

https://blog.csdn.net/lanchunhui/article/details/72891918

https://stackoverflow.com/questions/49141525/install-jupyter-notebook-on-miniconda

打开Anaconda Prompt，输入命令：

activate tensorflow
Jupyter Notebook

提示错误：

Traceback (most recent call last):
  File "D:\Anaconda3\Scripts\jupyter-Notebook-script.py", line 3, in <module>
    import notebook.notebookapp
  File "D:\Anaconda3\lib\site-packages\notebook\notebookapp.py", line 32, in <module>
    ioloop.install()
  File "D:\Anaconda3\lib\site-packages\zmq\eventloop\ioloop.py", line 195, in install
    assert (not ioloop.IOLoop.initialized()) or \
AttributeError: type object 'IOLoop' has no attribute 'initialized'

 解决办法：

pip uninstall tornado
pip install tornado==4.5.3

出现permissionerror，关闭所有与python有关的进程，重试，安装完成。

重新打开Jupyter Notebook.