难以理解的笔记本:不支持的JSON nbformat版本4(支持的版本:3)

Question

我刚刚在我的笔记本电脑上安装了IPython3.0 pip,运行Ubuntu14.04:

$ pip search ipython
ipython-cluster-helper    - Simplify IPython cluster start up and use for
                            multiple schedulers.
ipython                   - IPython: Productive Interactive Computing
  INSTALLED: 3.0.0 (latest)

但是,当我去使用时IPython,终端似乎认为它使用的是1.2.1版本:

$ ipython
Python 2.7.6 (default, Mar 22 2014, 22:59:38) 
Type "copyright", "credits" or "license" for more information.

IPython 1.2.1 -- An enhanced Interactive Python.
?         -> Introduction and overview of IPython's features.
%quickref -> Quick reference.
help      -> Python's own help system.
object?   -> Details about 'object', use 'object??' for extra details.

In [1]

更糟糕的是,当我在JSON nbformat版本4(IPython3.0支持)中打开笔记本时,我收到以下错误:

Unreadable Notebook: Unsupported JSON nbformat version 4 (supported version: 3)

我试图使用IPython团队建议的命令将笔记本降级到版本3 ,但这对我来说也失败了:

$ ipython nbconvert --to notebook --nbformat 3 1-intro-to-brian-neurons.ipynb 
. . .
[NbConvertApp] CRITICAL | Bad config encountered during initialization:
[NbConvertApp] CRITICAL | Unrecognized flag: '--nbformat'

这里发生了什么？

Answer 1

IPython之前使用 . 安装了旧版本的apt-get. 使用 删除旧版本apt-get remove ipython。