Jupyter 笔记本:未检测到 Widget Javascript [英] Jupyter notebook: Widget Javascript not detected

问题描述

问题:我在 MacOs 10.9 中使用 pip3 安装了 python3 和 jupyter notebook.
当我尝试运行小部件时，它给出了没有 javascript 小部件的错误.我在 Jupyter-notebook 中安装了 python3 和 R 内核.

Question: I installed python3 and jupyter notebook using pip3 in MacOs 10.9.
When I try to run the widget it gives error that there is no javascript widget. I have python3 and R kernels installed in Jupyter-notebook.

代码:

from ipywidgets import widgets
from IPython.display import display
text = widgets.Text()
display(text)
text.on_submit('hello')

错误:

Widget Javascript not detected.  It may not be installed or enabled properly.  

尝试:

sudo -H pip3 install ipywidgets  
sudo -H pip3 install -upgrade ipywidgets  
jupyter nbextension enable --py widgetsnbextension
# restarted the computer. 

最后一条命令出错.

[EnableNBExtensionApp] CRITICAL | Bad config encountered during initialization:
[EnableNBExtensionApp] CRITICAL | Unrecognized flag: '--py'

请注意，在 mac 中我有 jupyter-nbextension 命令，但命令是:

Note that in mac I have jupyter-nbextension command but the command:

jupyter-nbextension enable --py widgetsnbextension 

也不起作用.

但是 jupyter nbextension enable widgetsnbextension 没有错误并且什么也不做.如果我运行代码，则会弹出相同的错误.

But jupyter nbextension enable widgetsnbextension gives no error and also does nothing. The same error is popped in if I run the code.

还有，

import ipywidgets
ipywidgets.__version__

给出'6.0.0'.

一些注意事项:

which jupyter  
jupyter is /Library/Frameworks/Python.framework/Versions/3.5/bin/jupyter
which jupyter-notebook
jupyter-notebook is /Library/Frameworks/Python.framework/Versions/3.5/bin/jupyter-notebook

相关链接:

https://github.com/jupyter-widgets/ipywidgets/issues/541    
https://github.com/jupyter/help/issues/32    
https://github.com/jupyter/help/issues/131    
https://github.com/binder-project/binder/issues/83   

如何安装小部件?
我需要单独安装java吗?

How can I install widgets?
Do I need to install java separately ?

推荐答案

运行以下命令:jupyter nbextension enable --py --sys-prefix widgetsnbextension，然后在 Jupyter 中重启内核就可以了.

Run the following command: jupyter nbextension enable --py --sys-prefix widgetsnbextension, then restart the kernel in Jupyter should do the trick.

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