运行IPython中notebook：Kernel Restarting. The kernel appears to have died. It will restart automatically

在linuxd的Terminal中会看见这样的提示：

Traceback (most recent call last):
  File "", line 1, in
  File "/usr/lib/python2.7/dist-packages/IPython/kernel/__init__.py", line 10, in
    raise ImportError(__doc__)
ImportError: IPython.kernel has been replaced by IPython.parallel.
The previous version of IPython's parallel library was located at this
location (IPython.kernel). It has been moved to the IPython.parallel
subpackage and has been refactored to use zeromq/pyzmq instead of twisted.

该问题的主要原因可能是安装了不同版本的ipython，本人就是。

        首先删除一个：sudo apt-get remove ipython,重启系统，运行：ipython notebook，如能运行更好。我的是torndado版本太低，安装（tornado 3.2.2）就是了。

    顺便简单介绍一下安装ipython和notebook'的步骤：

    （1）可以使用自带的Ubuntu的python2.7；如果低的话，需要升级；

    （2）安装ipython：sudo pip install ipython;

    （3）安装 notebook：sudo apt-get install ipython-notebook;

    （4）安装自己需要的插件。