显示小部件的 Jupyter Lab 问题（javascript 错误）

Question

我在新 PC 上复制 Jupyter Lab 安装时遇到问题。它在我的前一个上工作得很好。我无法显示简单的小部件（例如 ipywidgets 或 ipyvuetify 中的复选框）。我检查了 jupyter-widgets 是否已通过 jupyter labextension list 启用。结果是：

    jupyter-vue v1.7.0 enabled ok
    jupyter-vuetify v1.8.4 enabled ok
    @jupyter-widgets/jupyterlab-manager v5.0.2 enabled ok (python, jupyterlab_widgets)

在笔记本中，当我尝试显示小部件时，单元格显示 JavaScript 错误：

    [Open Browser Console for more detailed log - Double click to close this message]
    Failed to load model class 'CheckboxModel' from module '@jupyter-widgets/controls'
    Error: Module @jupyter-widgets/controls, version ^1.5.0 is not registered, however,         
    2.0.0 is
    at f.loadClass (http://localhost:8888/lab/extensions/@jupyter-widgets/jupyterlab- 
    manager/static/134.083e6b37f2f7b2f04b5e.js?v=083e6b37f2f7b2f04b5e:1:74976)
    at f.loadModelClass (http://localhost:8888/lab/extensions/@jupyter-widgets/jupyterlab- 
    manager/static/150.467514c324d2bcc23502.js?v=467514c324d2bcc23502:1:10721)
    at f._make_model (http://localhost:8888/lab/extensions/@jupyter-widgets/jupyterlab- 
    manager/static/150.467514c324d2bcc23502.js?v=467514c324d2bcc23502:1:7517)
    at f.new_model (http://localhost:8888/lab/extensions/@jupyter-widgets/jupyterlab- 
    manager/static/150.467514c324d2bcc23502.js?v=467514c324d2bcc23502:1:5137)
    at f.handle_comm_open (http://localhost:8888/lab/extensions/@jupyter-widgets/jupyterlab- 
    manager/static/150.467514c324d2bcc23502.js?v=467514c324d2bcc23502:1:3894)
    at _handleCommOpen (http://localhost:8888/lab/extensions/@jupyter-widgets/jupyterlab- 
    manager/static/134.083e6b37f2f7b2f04b5e.js?v=083e6b37f2f7b2f04b5e:1:73392)
    at b._handleCommOpen (http://localhost:8888/static/lab/jlab_core.86360d749a1ef5f29afb.js? 
    v=86360d749a1ef5f29afb:2:924842)
    at async b._handleMessage 
    (http://localhost:8888/static/lab/jlab_core.86360d749a1ef5f29afb.js? 
    v=86360d749a1ef5f29afb:2:926832)

Answer 1

该错误与最近问题报告中指出的错误一致。建议更改为 ipywidgets 版本 7.7.2 或 7.6.5 来解决此问题。另外，请参阅此处的注释。