无法在jupyterhub中运行多个内核（Python版本）

Question

您好我正在使用jupyterhub运行笔记本服务器，但我无法访问不同的内核（python版本）。

我正确地有各种enronments设置，当我键入

jupyter kernelspec list 

我得到以下输出

Available kernels:    
bash  /home/username/.local/share/jupyter/kernels/bash 
python2 /usr/local/share/jupyter/kernels/python2     
python3 /usr/local/share/jupyter/kernels/python3 

但当jupyterhub启动它只能找到可用的Python3内核？

我怎样才能检测到所有可用的Python版本？

cat /usr/local/share/jupyter/kernels/python2/kernel.json 

{             
"display_name": "Python 2", 
"language": "python", 
"argv": [ 
"/opt/anaconda3/envs/py27/bin/python2.7", 
"-m", 
"ipykernel", 
"-f", 
"{connection_file}"               
]  
} 

cat /usr/local/share/jupyter/kernels/python3/kernel.json 

{ 
"language": "python",             
"display_name": "Python 3", 
"argv": [ 
"/opt/anaconda3/bin/python3", 
"-m", 
"ipykernel", 
"-f", 
"{connection_file}"               
] 
} 

Answer 1

请检查/usr/local/share/jupyter/kernels/python2/kernel.json文件的特权。如果它对每个人都不可读，那么你不会在Jupyter中看到它。

它应该有644个权限：

# ls -l 
-rw-r--r-- 1 root root 158 Apr 15 12:47 kernel.json 

Answer 2

您是否安装了python2.7的ipykernel？

pip2.7 install ipykernel 
python2.7 -m ipykernel install --user