Jupyter Notebook被Python 3.5破坏了。

Question

当我将Python版本从3.4更新到3.5（在Mac El Capitan上）时，我重新安装了Jupyter。但是当我运行它并创建新的Python 3笔记本时，它立即告诉我发生了内核错误，如果我点击它，我会得到以下错误信息：

Traceback (most recent call last):   File
"/usr/local/lib/python3.5/site-packages/notebook/base/handlers.py",
line 436, in wrapper
    result = yield gen.maybe_future(method(self, *args, **kwargs))   File
"/usr/local/lib/python3.5/site-packages/notebook/services/sessions/handlers.py",
line 56, in post
    model = sm.create_session(path=path, kernel_name=kernel_name)   File
"/usr/local/lib/python3.5/site-packages/notebook/services/sessions/sessionmanager.py",
line 66, in create_session
    kernel_name=kernel_name)   File "/usr/local/lib/python3.5/site-packages/notebook/services/kernels/kernelmanager.py",
line 84, in start_kernel
    **kwargs)   File "/usr/local/lib/python3.5/site-packages/jupyter_client/multikernelmanager.py",
line 109, in start_kernel
    km.start_kernel(**kwargs)   File "/usr/local/lib/python3.5/site-packages/jupyter_client/manager.py",
line 244, in start_kernel
    **kw)   File "/usr/local/lib/python3.5/site-packages/jupyter_client/manager.py",
line 190, in _launch_kernel
    return launch_kernel(kernel_cmd, **kw)   File "/usr/local/lib/python3.5/site-packages/jupyter_client/launcher.py",
line 123, in launch_kernel
    proc = Popen(cmd, **kwargs)   File "/usr/local/Cellar/python3/3.5.0/Frameworks/Python.framework/Versions/3.5/lib/python3.5/subprocess.py",
line 950, in __init__
    restore_signals, start_new_session)   File "/usr/local/Cellar/python3/3.5.0/Frameworks/Python.framework/Versions/3.5/lib/python3.5/subprocess.py",
line 1540, in _execute_child
    raise child_exception_type(errno_num, err_msg) FileNotFoundError: [Errno 2] No such file or directory:
'/usr/local/opt/python3/bin/python3.4'

我知道从3.4升级到3.5意味着软件包将被安装在不同的位置，但当我已经再次运行pip3 install jupyter（多次卸载/重新安装）时，我无法理解它正在Python 3.5软件包中寻找什么。是否有人知道如何修复这个问题？

- Jack Simpson

Answer 1

你的 IPython 中有一个指向 Python 3.4 的残留内核规范。 你可以使用以下命令来查看现有的内核规范：

jupyter kernelspec list

您可以通过以下方式安装新的 IPython 内核规范：

ipython kernelspec install [--user]

- minrk

---

非常感谢！现在所有问题都已解决！ - Jack Simpson

Answer 2

我遇到了和你一样的问题。我卸载了 Python 3 并重新安装它。

然后输入以下命令：

pip3 install jupyter ipython

这让我可以访问jupyter笔记本，但仍然存在内核错误。然后我输入：

python -m ipykernel install --user

它解决了我的问题。

- James Chang