【发布时间】：2016-05-23 15:28:45
【问题描述】：
我使用 ipython 和一点点 jupyter 已经有一段时间了，前段时间。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，让 pip 工作并安装了必要的软件包：
pip install jupyter
pip install notebook
等等。完成之后，我尝试进入一个旧笔记本（用 2.7 编写），但没有连接到内核。我想，好吧，为什么不更新到最新的 python 3 版本并尝试一下。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 2.7，一个使用 python 3.5。两者都是这样安装的：
conda create --name py27 python=2.7 anaconda
conda create --name py35 python=3.5 anaconda
之后，我通过激活它们并尝试安装包来确保两个 venv 都安装了 jupyter。 （这是使用 py27 和 py35 完成的，它们是从上面的命令中看到的 venv 的名称）。
activate py27
conda install jupyter
之后我尝试运行：
jupyter notebook
我创建了一个新的笔记本文件来查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 上尝试过的，但是我在 py27 venv 上遇到了同样的错误。我尝试了一些方法，例如运行 kernelspec，但都没有成功。
有人对可能出了什么问题提出了建议？
【问题讨论】：
标签： python-2.7 windows-10 jupyter python-3.5 jupyter-notebook