【发布时间】：2018-05-08 09:52:22
【问题描述】：
我在 Windows 7 上安装了 64 位 Anaconda Navigator。我无法运行 Jupyter 笔记本，但能够运行 qtconsole。
启动笔记本时给出的错误是
[I 14:50:50.679 NotebookApp] The port 8888 is already in use, trying
another port.
[I 14:50:50.680 NotebookApp] The port 8889 is already in use, trying
another port.
[I 14:50:52.093 NotebookApp] JupyterLab beta preview extension loaded
from E:\Users\jiten\Anaconda3\lib\site-packages\jupyterlab
[I 14:50:52.093 NotebookApp] JupyterLab application directory is
E:\Users\jiten\Anaconda3\share\jupyter\lab
[W 14:50:52.249 NotebookApp] Error loading server extension jupyterlab
Traceback (most recent call last):
File "E:\Users\jiten\Anaconda3\lib\site-
packages\jupyterlab\commands.py", line 321, in __init__
self._run(['node', 'node-version-check.js'], cwd=HERE, quiet=True)
File "E:\Users\jiten\Anaconda3\lib\site-
packages\jupyterlab\commands.py", line 1165, in _run
proc = Process(cmd, **kwargs)
File "E:\Users\jiten\Anaconda3\lib\site-packages\jupyterlab\process.py",
line 73, in __init__
self.proc = self._create_process(cwd=cwd, env=env)
File "E:\Users\jiten\Anaconda3\lib\site-packages\jupyterlab\process.py",
line 131, in _create_process
cmd[0] = which(cmd[0], kwargs.get('env'))
File "E:\Users\jiten\Anaconda3\lib\site-packages\jupyterlab\jlpmapp.py",
line 59, in which
raise ValueError(msg)
ValueError: Please install nodejs 5+ and npm before continuing
installation.
nodejs may be installed using conda or directly from the nodejs website.
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "E:\Users\jiten\Anaconda3\lib\site-packages\notebook\notebookapp.py",
line 1454, in init_server_extensions
func(self)
File "E:\Users\jiten\Anaconda3\lib\site-packages\jupyterlab\extension.py",
line 111, in load_jupyter_server_extension
info = get_app_info(app_dir)
File "E:\Users\jiten\Anaconda3\lib\site-packages\jupyterlab\commands.py",
line 244, in get_app_info
handler = _AppHandler(app_dir, logger)
File "E:\Users\jiten\Anaconda3\lib\site-packages\jupyterlab\commands.py",
line 324, in __init__
raise ValueError(msg)
ValueError: Please install nodejs 5+ and npm before continuing
installation. nodejs may be installed using conda or directly from the
nodejs website.
[I 14:50:55.229 NotebookApp] Serving notebooks from local directory:
C:\Users\jiten
[I 14:50:55.230 NotebookApp] 0 active kernels
[I 14:50:55.230 NotebookApp] The Jupyter Notebook is running at:
[I 14:50:55.230 NotebookApp] http://localhost:8890/?
token=b940b659aa0077da88a7b4247dc4fac2355ff6e405801078
[I 14:50:55.231 NotebookApp] Use Control-C to stop this server and shut
down all kernels (twice to skip confirmation).
[C 14:50:55.234 NotebookApp]
Copy/paste this URL into your browser when you connect for the first time,
to login with a token:
http://localhost:8890/?
token=b940b659aa0077da88a7b4247dc4fac2355ff6e405801078
虽然在我的默认浏览器中打开了一个空白页面（在少数安装的浏览器中选择了 IE），网页地址：
http://localhost:8890/tree?token=b6a5317718c42147edea2aac32ebd401ea091c730d3daeeb
另外，我无法从命令提示符运行命令“python”，因为给出了错误：
C:\Windows\system32>python
'python' is not recognized as an internal or external command,
operable program or batch file.
对不起，尽管我尽了最大努力，但我对安装过程以及如何包含路径的理解非常差。另外，不知道我在 E: 驱动器中进行的安装是否会导致这些问题，即不是 C: 驱动器。
请提供示例、详细说明或类似网站的链接。
更新 1：有一个单独的“Anaconda 命令提示符”用于查看 Anaconda Navigator 安装的 Python 版本。它可以通过“开始”菜单访问。发现 this clip 很有帮助。
【问题讨论】：
标签： python installation anaconda jupyter-notebook