全新的Windows 10安装anaconda和jupyter - 内核错误（Python 2.7和3.5）

Question

一段时间以前，我一直在使用ipython和一些jupyter。在将近6个月没有使用它之后，我想再次开始使用它。

我安装了最新版本的jupyter，更新了我的python 2.7安装，得到了pip工作并安装了必要的软件包：

pip install jupyter
pip install notebook 

完成后我尝试输入一个旧的笔记本（用2.7编写），但没有与内核的连接。我想，好吧，为什么不更新到最新的python 3版本并试试。这导致了同样的问题。

我继续安装anaconda并创建了两个虚拟环境，一个使用python 2.7，另一个使用python 3.5。两者都安装如下：

conda create --name py27 python=2.7 anaconda
conda create --name py35 python=3.5 anaconda

之后，我确保两个venvs都通过激活它们并尝试安装包装来安装jupyter。 （这是用py27和py35完成的，它们是从上面的命令中看到的venvs的名字）。

activate py27
conda install jupyter

之后我试着跑：

jupyter notebook

我创建了一个新的笔记本文件，看看我是否可以访问内核。但是很明显我没有出现以下错误：

Traceback (most recent call last):
  File "E:\Anaconda3\envs\py35\lib\site-packages\notebook\base\handlers.py", line 458, in wrapper
    result = yield gen.maybe_future(method(self, *args, **kwargs))
  File "E:\Anaconda3\envs\py35\lib\site-packages\tornado\gen.py", line 1008, in run
    value = future.result()
  File "E:\Anaconda3\envs\py35\lib\site-packages\tornado\concurrent.py", line 232, in result
    raise_exc_info(self._exc_info)
  File "<string>", line 3, in raise_exc_info
  File "E:\Anaconda3\envs\py35\lib\site-packages\tornado\gen.py", line 1014, in run
    yielded = self.gen.throw(*exc_info)
  File "E:\Anaconda3\envs\py35\lib\site-packages\notebook\services\sessions\handlers.py", line 58, in post
    sm.create_session(path=path, kernel_name=kernel_name))
  File "E:\Anaconda3\envs\py35\lib\site-packages\tornado\gen.py", line 1008, in run
    value = future.result()
  File "E:\Anaconda3\envs\py35\lib\site-packages\tornado\concurrent.py", line 232, in result
    raise_exc_info(self._exc_info)
  File "<string>", line 3, in raise_exc_info
  File "E:\Anaconda3\envs\py35\lib\site-packages\tornado\gen.py", line 1014, in run
    yielded = self.gen.throw(*exc_info)
  File "E:\Anaconda3\envs\py35\lib\site-packages\notebook\services\sessions\sessionmanager.py", line 73, in create_session
    self.kernel_manager.start_kernel(path=kernel_path, kernel_name=kernel_name)
  File "E:\Anaconda3\envs\py35\lib\site-packages\tornado\gen.py", line 1008, in run
    value = future.result()
  File "E:\Anaconda3\envs\py35\lib\site-packages\tornado\concurrent.py", line 232, in result
    raise_exc_info(self._exc_info)
  File "<string>", line 3, in raise_exc_info
  File "E:\Anaconda3\envs\py35\lib\site-packages\tornado\gen.py", line 282, in wrapper
    yielded = next(result)
  File "E:\Anaconda3\envs\py35\lib\site-packages\notebook\services\kernels\kernelmanager.py", line 87, in start_kernel
    super(MappingKernelManager, self).start_kernel(**kwargs)
  File "E:\Anaconda3\envs\py35\lib\site-packages\jupyter_client\multikernelmanager.py", line 109, in start_kernel
    km.start_kernel(**kwargs)
  File "E:\Anaconda3\envs\py35\lib\site-packages\jupyter_client\manager.py", line 244, in start_kernel**kw)
  File "E:\Anaconda3\envs\py35\lib\site-packages\jupyter_client\manager.py", line 190, in _launch_kernel
    return launch_kernel(kernel_cmd, **kw)
  File "E:\Anaconda3\envs\py35\lib\site-packages\jupyter_client\launcher.py", line 108, in launch_kernel
    proc = Popen(cmd, **kwargs)
  File "E:\Anaconda3\envs\py35\lib\subprocess.py", line 950, in __init__ restore_signals, start_new_session)
  File "E:\Anaconda3\envs\py35\lib\subprocess.py", line 1220, in _execute_child startupinfo)
FileNotFoundError: [WinError 2] The system cannot find the file specified

这显然是在我的py35 venv上尝试但是我在py27 venv上得到了同样的错误。我尝试了一些诸如运行kernelspec之类的东西，但没有任何成功。

有人建议可能出现什么问题？

Answer 1

我遇到了同样的问题。您需要为jupyter笔记本创建kernelspec。请点击此链接解决问题。

How to start an ipython shell(not notebook) within a conda or virtualenv