从IPython 5.x升级到6.0导致IPython.utils.warn崩溃导致崩溃

Question

我最近通过condo update ipython从IPython 5.x升级到6.0。不过，我得到内核崩溃：

Traceback (most recent call last): 
    File "//anaconda/lib/python3.5/runpy.py", line 170, in _run_module_as_main 
    "__main__", mod_spec) 
    File "//anaconda/lib/python3.5/runpy.py", line 85, in _run_code 
    exec(code, run_globals) 
    File "//anaconda/lib/python3.5/site-packages/ipykernel/__main__.py", line 2, in <module> 
    from ipykernel import kernelapp as app 
    File "//anaconda/lib/python3.5/site-packages/ipykernel/kernelapp.py", line 37, in <module> 
    from .ipkernel import IPythonKernel 
    File "//anaconda/lib/python3.5/site-packages/ipykernel/ipkernel.py", line 15, in <module> 
    from .zmqshell import ZMQInteractiveShell 
    File "//anaconda/lib/python3.5/site-packages/ipykernel/zmqshell.py", line 46, in <module> 
    from IPython.utils.warn import error 
ImportError: No module named 'IPython.utils.warn' 
[I 18:35:28.928 NotebookApp] KernelRestarter: restarting kernel (1/5) 

显然，问题是，IPython.utils.warn被弃用，has now been removed为6.0.0版本。我怎样才能解决这个问题？

注：无下面的工作：

pip install --upgrade ipython 
pip install --upgrade jupyter 
pip install --upgrade --no-deps --force-reinstall ipython 
pip install --upgrade --no-deps --force-reinstall jupyter 

Answer 1

我有同样的问题。以下行解决了我的问题：

conda update ipykernel 

我不知道为什么这不是自动完成的。

Answer 2

+1同样的问题。

解决方法是降级到IPython中的最新的可用5.x版（目前通过conda search ipython发现5.3.0）：

conda install ipython=5.3.0 

现在Jupyter笔记本内核可以重新开始。