python - jupyter 笔记本，导入错误 : cannot import name 'Type'

Question

我是 Windows 用户，我的电脑上安装了 Python 3.6。为了使用 Jupyter notebooks，我下载了 atom。我已经安装了 ipython 和 pandas。输入命令后jupyter notebook在命令行上，我的浏览器没有打开 jupyter notebook，而是收到以下错误消息:

[C:\Users\ELIDAD>jupyter notebook
Traceback (most recent call last):
  File "c:\users\elidad\appdata\local\programs\python\python35\lib\runpy.py", line 170, in _run_module_as_main
    "__main__", mod_spec)
  File "c:\users\elidad\appdata\local\programs\python\python35\lib\runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "C:\Users\ELIDAD\AppData\Local\Programs\Python\Python35\Scripts\jupyter-notebook.EXE\__main__.py", line 5, in <module>
  File "c:\users\elidad\appdata\local\programs\python\python35\lib\site-packages\notebook\__init__.py", line 25, in <module>
    from .nbextensions import install_nbextension
  File "c:\users\elidad\appdata\local\programs\python\python35\lib\site-packages\notebook\nbextensions.py", line 610, in <module>
    from .extensions import (
  File "c:\users\elidad\appdata\local\programs\python\python35\lib\site-packages\notebook\extensions.py", line 8, in <module>
    from tornado.log import LogFormatter
  File "c:\users\elidad\appdata\local\programs\python\python35\lib\site-packages\tornado\log.py", line 34, in <module>
    from tornado.escape import _unicode
  File "c:\users\elidad\appdata\local\programs\python\python35\lib\site-packages\tornado\escape.py", line 27, in <module>
    from tornado.util import unicode_type
  File "c:\users\elidad\appdata\local\programs\python\python35\lib\site-packages\tornado\util.py", line 21, in <module>
    from typing import (
ImportError: cannot import name 'Type']

那么，问题是什么？我是 python 和 jupyter notebook 的新手。非常感谢。

Answer 1

这是因为 Python3.5 有自己的版本打字( https://docs.python.org/3/library/typing.html )，与已安装的 jupyter/tornado 版本不兼容
升级到python3.6可以解决问题。