关于python：jupyter-notebook，ImportError：无法导入名称’Type’

jupyter-notebook, ImportError: cannot import name 'Type'

我是Windows用户，并且已经在计算机上安装了python 3.6。为了使用jupyter notebookd，我下载了atom，我已经安装了ipython和pandas。安装后，在命令行上输入命令" jupyter notebook"后，我发现浏览器不会打开jupyter notebook，而是显示以下错误消息：

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26

[C:\Users\ELIDAD>jupyter notebook
Traceback (most recent call last):
File"c:\users\elidad\appdata\local\programs\python\python35\lib
unpy.py", line 170, in _run_module_as_main
"__main__", mod_spec)
File"c:\users\elidad\appdata\local\programs\python\python35\lib
unpy.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
otebook\__init__.py", line 25, in <module>
from .nbextensions import install_nbextension
File"c:\users\elidad\appdata\local\programs\python\python35\lib\site-packages
otebook
bextensions.py", line 610, in <module>
from .extensions import (
File"c:\users\elidad\appdata\local\programs\python\python35\lib\site-packages
otebook\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，有什么问题呢？我是python和jupyter笔记本的新手。非常感谢你。