将 Python 3 内核的 IPython 3 也更改为集群的 python2

Question

我为 Python 3 安装了 IPython 3，以便与 Jupyterhub 一起使用。

现在我可以使用带有 Python2 内核的笔记本，因为我创建了/usr/local/share/jupyter/kernels/python2/kernel.json

跟：

{
 "argv": ["python2", "-m", "IPython.kernel",
          "-f", "{connection_file}"],
 "display_name": "Python 2",
 "language": "python2"
}

现在我也想使用 IPython.parallel，但是当我启动集群时，它会自动启动 Python 3 中的引擎，我怎样才能将其更改为 Python 2？

Answer 1

我通过以下方式解决了这个问题

sudo mkdir /etc/ipython/

sudo nano /etc/ipython/ipython_config.py

添加以下行：

    c = get_config()
    c.LocalControllerLauncher.controller_cmd = ['/usr/bin/python2', '-m', 'IPython.parallel.controller']
    c.LocalEngineLauncher.engine_cmd = ['/usr/bin/python2', '-m', 'IPython.parallel.engine']
    c.LocalEngineSetLauncher.engine_cmd = ['/usr/bin/python2', '-m', 'IPython.parallel.engine']

现在引擎应该从python2开始

编辑 Jupyter 1.0 或 IPython 4.0：更改为

c = get_config()
c.LocalControllerLauncher.controller_cmd = ['/usr/bin/python2', '-m', 'ipyparallel.controller']
c.LocalEngineLauncher.engine_cmd = ['/usr/bin/python2', '-m', 'ipyparallel.engine']
c.LocalEngineSetLauncher.engine_cmd = ['/usr/bin/python2', '-m', 'ipyparallel.engine']

并恢复群集选项卡： sudo mkdir/etc/jupyter/

sudo nano /etc/jupyter/jupyter_notebook_config.py

添加这个：

c.NotebookApp.server_extensions.append('ipyparallel.nbextension')