jupyter notebook 和 spyder 没有从 anaconda 提示符启动。但是它之前工作正常。 它给了我以下错误：

Question

(base) C:\Users\Aakash\anaconda3>jupyter notebook

Traceback (most recent call last):

File "C:\Users\Aakash\anaconda3\Scripts\jupyter-notebook-script.py", line 6, in from notebook.notebookapp import main

File "C:\Users\Aakash\anaconda3\lib\site-packages\notebook\notebookapp.py", line 49, in from zmq.eventloop import ioloop

File "C:\Users\Aakash\anaconda3\lib\site-packages\zmq__init__.py", line 47, in from zmq import backend

File "C:\Users\Aakash\anaconda3\lib\site-packages\zmq\backend__init__.py", line 40, in reraise(*exc_info)

File "C:\Users\Aakash\anaconda3\lib\site-packages\zmq\utils\sixcerpt.py", line 34, in reraise raise value

File "C:\Users\Aakash\anaconda3\lib\site-packages\zmq\backend__init__.py", line 27, in _ns = select_backend(first)

File "C:\Users\Aakash\anaconda3\lib\site-packages\zmq\backend\select.py", line 28, in select_backend mod = import (name, fromlist=public_api)

File "C:\Users\Aakash\anaconda3\lib\site-packages\zmq\backend\cython__init__.py", line 6, in from. import (constants, error, message, context,

ImportError: DLL load failed: The specified module could not be found.

Answer 1

Run these on anaconda prompt:

conda upgrade qt

OR

conda uninstall tornado
conda install tornado==6.0.4

OR

Check these previous answers Anaconda Navigator Jupyter and Spyder won't start after successful installation