jupyter lab 无法启动

Question

输入jupyter-lab 后出现如下代码

C:\Users\51767>jupyter-lab
Traceback (most recent call last):
  File "C:\Users\51767\AppData\Local\Programs\Python\Python310\lib\runpy.py", line 196, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "C:\Users\51767\AppData\Local\Programs\Python\Python310\lib\runpy.py", line 86, in _run_code
    exec(code, run_globals)
  File "C:\Users\51767\AppData\Local\Programs\Python\Python310\Scripts\jupyter-lab.exe\__main__.py", line 4, in <module>
  File "C:\Users\51767\AppData\Local\Programs\Python\Python310\lib\site-packages\jupyterlab\__init__.py", line 7, in <module>
    from .serverextension import load_jupyter_server_extension
  File "C:\Users\51767\AppData\Local\Programs\Python\Python310\lib\site-packages\jupyterlab\serverextension.py", line 1, in <module>
    from tornado.web import RedirectHandler
ModuleNotFoundError: No module named 'tornado.web'

显示ModuleNotFoundError: No module named 'tornado.web'

上网搜索找不到相关问题

希望能打开jupyterlab

Answer 1

导致这个报错的原因也非常多，下面是可能的原因

1. module包没安装
2忘了import
3没有__init__.py文件
4package包的版本不对
5自定义的包名与安装的包名相同，导致import包的时候导错了包
6没设置PYTHONPATH或者
7自建的module包所在路径不在PYTHONPATH下
8不恰当的使用了相对导入

ModuleNotFoundError: No module named 'xxx'可能的解决方案大全 - Lucky小黄人^_^ - 博客园 "ModuleNotFoundError: No module named 'xxx'"这个报错是个非常常见的报错，几乎每个python程序员都遇到过，导致这个报错 https://www.cnblogs.com/hi3254014978/p/15202910.html