mac_conda_jupyter_python2_kernel和扩展

扩展

https://zodiac911.github.io/blog/jupyter-nbextensions-configurator.html

mac

AttributeError: type object 'IOLoop' has no attribute 'initialized'

原因：

tornado版本过高，不支持jupyter notebook

解决办法

conda install tornado=4.5

conda create -n py27 python=2.7
conda activate py27
conda install ipykernel
pip install backports.functools-lru-cache -i http://pypi.douban.com/simple/ --trusted-host=pypi.douban.com/simple
pip install --upgrade jupyter_client -i http://pypi.douban.com/simple/ --trusted-host=pypi.douban.com/simple
python -m ipykernel install --user
conda install tornado=4.5

https://blog.csdn.net/sinat_40875078/article/details/105613231
https://blog.csdn.net/Sandwichsauce/article/details/88636114
https://stackoverflow.com/questions/58792782/importerror-cannot-import-name-secure-write-while-updating-python-in-conda-e