Python 我正在试着运行jupyter笔记本。但是得到以下错误：

我正在试着运行jupyter笔记本。但是得到以下错误：

> Traceback (most recent call last):   File
> "c:\users\lenovo\appdata\local\programs\python\python37\lib\runpy.py",
> line 193, in _run_module_as_main
>     "__main__", mod_spec)   File "c:\users\lenovo\appdata\local\programs\python\python37\lib\runpy.py",
> line 85, in _run_code
>     exec(code, run_globals)   File "C:\Users\lenovo\AppData\Local\Programs\Python\Python37\Scripts\jupyter-notebook.EXE\__main__.py",
> line 5, in <module>   File
> "c:\users\lenovo\appdata\local\programs\python\python37\lib\site-packages\notebook\notebookapp.py",
> line 47, in <module>
>     from zmq.eventloop import ioloop   File "C:\Users\lenovo\AppData\Roaming\Python\Python37\site-packages\zmq\__init__.py",
> line 47, in <module>
>     from zmq import backend   File "C:\Users\lenovo\AppData\Roaming\Python\Python37\site-packages\zmq\backend\__init__.py",
> line 40, in <module>
>     reraise(*exc_info)   File "C:\Users\lenovo\AppData\Roaming\Python\Python37\site-packages\zmq\utils\sixcerpt.py",
> line 34, in reraise
>     raise value   File "C:\Users\lenovo\AppData\Roaming\Python\Python37\site-packages\zmq\backend\__init__.py",
> line 27, in <module>
>     _ns = select_backend(first)   File "C:\Users\lenovo\AppData\Roaming\Python\Python37\site-packages\zmq\backend\select.py",
> line 28, in select_backend
>     mod = __import__(name, fromlist=public_api)   File "C:\Users\lenovo\AppData\Roaming\Python\Python37\site-packages\zmq\backend\cython\__init__.py",
> line 6, in <module>
>     from . import (constants, error, message, context, ImportError: cannot import name 'constants' from 'zmq.backend.cython'
> (C:\Users\lenovo\AppData\Roaming\Python\Python37\site-packages\zmq\backend\cython\__init__.py)

>回溯（最近一次调用上次）：文件
>“c:\users\lenovo\appdata\local\programs\python\python37\lib\runpy.py”，
>第193行，运行模块作为主模块
>“\uuuuu main\uuuuuuuu”，mod\u spec）文件“c:\users\lenovo\appdata\local\programs\python\python37\lib\runpy.py”，
>第85行，输入运行代码
>exec（代码，运行全局）文件“C:\Users\lenovo\AppData\Local\Programs\Python\Python37\Scripts\jupyter notebook.EXE\ \uuuuuu main\uuuuuu.py”，
>第5行，在文件中
>“c:\users\lenovo\appdata\local\programs\python37\lib\site packages\notebookapp.py”，
>第47行，在
>从zmq.eventloop导入ioloop文件“C:\Users\lenovo\AppData\Roaming\Python\Python37\site packages\zmq\\uuuu init\uuuu.py”，
>第47行，在
>从zmq导入后端文件“C:\Users\lenovo\AppData\Roaming\Python\Python37\site packages\zmq\backend\\uuuu init\uuuu.py”，
>第40行，在
>重新播放（*exc_info）文件“C:\Users\lenovo\AppData\Roaming\Python\Python37\site packages\zmq\utils\sixerpt.py”，
>第34行，重新播放
>提升值文件“C:\Users\lenovo\AppData\Roaming\Python37\site packages\zmq\backend\\uuuu init\uuuu.py”，
>第27行，在
>\u ns=选择\u后端（第一个）文件“C:\Users\lenovo\AppData\Roaming\Python\Python37\site packages\zmq\backend\select.py”，
>第28行，在select_backend中
>mod=\uuuuu import\uuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu（名称，fromlist=public\uapi）文件“C:\Users\lenovo\AppData\Roaming，
>第6行，在
>从。导入（常量、错误、消息、上下文、导入错误：无法从“zmq.backend.cython”导入名称“常量”
>（C:\Users\lenovo\AppData\Roaming\Python37\site packages\zmq\backend\cython\\uuuu init\uuu.py）

试试：

pip uninstall pyzmq
pip install pyzmq