Jupyter Notebook JSON无效

Question

我已经安装了Anaconda3，并且正在使用一个名为'myenv‘的环境。在环境中，我已经安装了ipywidgets

conda install --name myenv -c conda-forge ipywidgets

我可以看到ipywidgets已安装在此环境中

ipywidgets                7.1.2                    py36_0    conda-forge

但是，当我打开一个笔记本时，每次都会得到以下错误：

Notebook validation failed: 'execution_count' is a required property:
{
 "data": {
  "text/html": "<p>Failed to display Jupyter Widget of type <code>HBox</code>.</p>\n<p>\n  If you're reading this message in the Jupyter Notebook or JupyterLab Notebook, it may mean\n  that the widgets JavaScript is still loading. If this message persists, it\n  likely means that the widgets JavaScript library is either not installed or\n  not enabled. See the <a href=\"https://ipywidgets.readthedocs.io/en/stable/user_install.html\">Jupyter\n  Widgets Documentation</a> for setup instructions.\n</p>\n<p>\n  If you're reading this message in another frontend (for example, a static\n  rendering on GitHub or <a href=\"https://nbviewer.jupyter.org/\">NBViewer</a>),\n  it may mean that your frontend doesn't currently support widgets.\n</p>\n",
  "text/plain": "HBox(children=(IntProgress(value=0, description='Epoch', max=2), HTML(value='')))"
 },
 "metadata": {},
 "output_type": "execute_result"
}

在控制台中：

Notebook JSON is invalid: 'execution_count' is a required property

你有什么办法解决这个问题吗？

Answer 1

尝试“内核->重新启动并运行全部”，然后尝试“文件->保存和检查点”