无法将 python3 内核添加到 Jupyter
Cannot add python3 kernel to Jupyter
我想更改 Jupyter 中内核的路径，将其设置为我在机器中使用的路径。
这是在 jupyter 中安装的原始内核：
jupyter kernelspec list
Available kernels:
python3 /home/n/.local/share/jupyter/kernels/python3
python2 /usr/local/share/jupyter/kernels/python2
然后我在我的机器中检查了 python3 的路径，如下所示：
which python3
/usr/bin/python3
$ ipython 内核规范列表
我这样删除了python3的内核：
jupyter kernelspec uninstall python3
成功执行，然后我尝试使用我之前找到的路径安装 python3，如下所示：
jupyter kernelspec install /usr/bin/python3
这给了我这个错误：
File "/usr/local/bin/jupyter-kernelspec", line 11, in
sys.exit(KernelSpecApp.launch_instance())
File "/usr/local/lib/python2.7/dist-packages/traitlets/config/application.py",
line 658, in launch_instance
app.start()
File "/usr/local/lib/python2.7/dist-packages/jupyter_client/kernelspecapp.py",
line 273, in start
return self.subapp.start()
File "/usr/local/lib/python2.7/dist-packages/jupyter_client/kernelspecapp.py",
line 143, in start
replace=self.replace,
File "/usr/local/lib/python2.7/dist-packages/jupyter_client/kernelspec.py",
line 299, in install_kernel_spec
shutil.copytree(source_dir, destination)
File "/usr/lib/python2.7/shutil.py", line 171, in copytree
names = os.listdir(src) OSError: [Errno 20] Not a directory: '/usr/bin/python3'
然后我寻找正确的路径是这样的：
python3 -c "import sys; print ('\n'.join(sys.path))"
/usr/lib/python3.4
/usr/lib/python3.4/plat-x86_64-linux-gnu
/usr/lib/python3.4/lib-dynload
/usr/local/lib/python3.4/dist-packages
/usr/local/lib/python3.4/dist-packages/setuptools-28.8.0-py3.4.egg
/usr/lib/python3/dist-packages
我试过这样安装它：
sudo jupyter kernelspec install /usr/lib/python3.4
[InstallKernelSpec] Installed kernelspec python3.4 in
/usr/local/share/jupyter/kernels/python3.4
现在，当我启动 jupyter 时，根本没有 Python 3 作为内核，我现在不确定该怎么办？
您可能没有在 python 3 安装中安装 ipykernel。要安装 python 内核，正确的步骤是：
pip3 install ipykernel
python3 -m ipykernel install --user
见here
我可以通过使用 anaconda 重新安装 python3 来解决问题，anaconda 随附在其包中的 Jupyter 中。
您可以按照此处的命令安装anaconda：
https://conda.io/docs/user-guide/install/linux.html
我想更改 Jupyter 中内核的路径，将其设置为我在机器中使用的路径。
这是在 jupyter 中安装的原始内核：
jupyter kernelspec list
Available kernels:
python3 /home/n/.local/share/jupyter/kernels/python3
python2 /usr/local/share/jupyter/kernels/python2
然后我在我的机器中检查了 python3 的路径，如下所示：
which python3
/usr/bin/python3
$ ipython 内核规范列表
我这样删除了python3的内核：
jupyter kernelspec uninstall python3
成功执行，然后我尝试使用我之前找到的路径安装 python3，如下所示：
jupyter kernelspec install /usr/bin/python3
这给了我这个错误：
File "/usr/local/bin/jupyter-kernelspec", line 11, in sys.exit(KernelSpecApp.launch_instance())
File "/usr/local/lib/python2.7/dist-packages/traitlets/config/application.py", line 658, in launch_instance app.start()
File "/usr/local/lib/python2.7/dist-packages/jupyter_client/kernelspecapp.py", line 273, in start return self.subapp.start()
File "/usr/local/lib/python2.7/dist-packages/jupyter_client/kernelspecapp.py", line 143, in start replace=self.replace,
File "/usr/local/lib/python2.7/dist-packages/jupyter_client/kernelspec.py", line 299, in install_kernel_spec shutil.copytree(source_dir, destination)
File "/usr/lib/python2.7/shutil.py", line 171, in copytreenames = os.listdir(src) OSError: [Errno 20] Not a directory: '/usr/bin/python3'
然后我寻找正确的路径是这样的：
python3 -c "import sys; print ('\n'.join(sys.path))"
/usr/lib/python3.4
/usr/lib/python3.4/plat-x86_64-linux-gnu
/usr/lib/python3.4/lib-dynload
/usr/local/lib/python3.4/dist-packages
/usr/local/lib/python3.4/dist-packages/setuptools-28.8.0-py3.4.egg
/usr/lib/python3/dist-packages
我试过这样安装它：
sudo jupyter kernelspec install /usr/lib/python3.4
[InstallKernelSpec] Installed kernelspec python3.4 in /usr/local/share/jupyter/kernels/python3.4
现在，当我启动 jupyter 时，根本没有 Python 3 作为内核，我现在不确定该怎么办？
您可能没有在 python 3 安装中安装 ipykernel。要安装 python 内核，正确的步骤是：
pip3 install ipykernel
python3 -m ipykernel install --user
见here
我可以通过使用 anaconda 重新安装 python3 来解决问题，anaconda 随附在其包中的 Jupyter 中。
您可以按照此处的命令安装anaconda： https://conda.io/docs/user-guide/install/linux.html