Jupyter实验室未能启动

Question

我今天更新了我的conda环境.以前,我可以从终端启动jupyter实验室.更新后(包括安装theano,但我猜这是无关的),我得到以下错误,我不明白:

marcel@flaptop:~$ jupyter lab
Traceback (most recent call last):
File "/home/marcel/anaconda3/bin/jupyter-lab", line 7, in <module> from jupyterlab.labapp import main
File "/home/marcel/anaconda3/lib/python3.6/site-packages/jupyterlab/labapp.py", line 7, in <module> from notebook.notebookapp import NotebookApp, aliases, flags  
File "/home/marcel/anaconda3/lib/python3.6/site-packages/notebook/notebookapp.py", line 45, in <module> ioloop.install()
File "/home/marcel/anaconda3/lib/python3.6/site-packages/zmq/eventloop/ioloop.py", line 210, in install assert (not ioloop.IOLoop.initialized()) or  AttributeError: type object 'IOLoop' has no attribute 'initialized'

有谁知道这里发生了什么？

Answer 1

似乎是Tornado版本5.这里有讨论: 在Miniconda上安装Jupyter Notebook

pip uninstall tornado pip install tornado==4.5.3

为我修好了,如上面的链接所示.