更新(2021年7月)。

function ConnectButton(){ 
    console.log("Working"); 
    document.querySelector("#connect").click() 
}
setInterval(ConnectButton, 60000);

试试这个:

function ClickConnect(){
  console.log("Working"); 
  document
    .querySelector("#top-toolbar > colab-connect-button")
    .shadowRoot
    .querySelector("#connect")
    .click()
}

setInterval(ClickConnect,60000)

尝试这样做可以避免在您尝试模拟每分钟单击工具栏连接按钮时出现所有恼人的对话框。你可以复制粘贴到你的控制台，调用这个方法，你就可以在笔记本上工作了。

function connectRefresher() {
       window.ConnectButtonIntervalId = setInterval(function ConnectButton(){
                console.log("connected"); 
                document.querySelector("#top-toolbar > colab-connect-button").shadowRoot.querySelector("#connect").click();
                document.querySelector("colab-sessions-dialog").shadowRoot.querySelector("#footer > div > paper-button").click();
                console.log("closed the dialog!!"); 
            },60000);
    }
    
function clearRefresher() { 
           console.log("clear Interval called !!");
           clearInterval(window.ConnectButtonIntervalId);
    }

 connectRefresher(); //to connect the refresher
 clearRefresher(); //to disconnect the refresher

我不相信JavaScript解决方案还能继续工作。我在我的笔记本里写了:

    from IPython.display import display, HTML
    js = ('<script>function ConnectButton(){ '
           'console.log("Connect pushed"); '
           'document.querySelector("#connect").click()} '
           'setInterval(ConnectButton,3000);</script>')
    display(HTML(js))

当你第一次执行Run all(在JavaScript或Python代码开始之前)时，控制台显示:

Connected to
wss://colab.research.google.com/api/kernels/0e1ce105-0127-4758-90e48cf801ce01a3/channels?session_id=5d8...

然而，每次JavaScript运行时，你都会看到console.log部分，但点击部分只是给出:

Connect pushed

Uncaught TypeError: Cannot read property 'click' of null
 at ConnectButton (<anonymous>:1:92)

其他人建议按钮名称已更改为# coab -connect-button，但这也会产生相同的错误。

After the runtime is started, the button is changed to show RAM/DISK, and a drop down is presented. Clicking on the drop down creates a new <DIV class=goog menu...> that was not shown in the DOM previously, with 2 options "Connect to hosted runtime" and "Connect to local runtime". If the console window is open and showing elements, you can see this DIV appear when you click the dropdown element. Simply moving the mouse focus between the two options in the new window that appears adds additional elements to the DOM, as soon as the mouse looses focus, they are removed from the DOM completely, even without clicking.

下面的JavaScript代码适合我。感谢@artur.k.space。

function ColabReconnect() {
    var dialog = document.querySelector("colab-dialog.yes-no-dialog");
    var dialogTitle = dialog && dialog.querySelector("div.content-area>h2");
    if (dialogTitle && dialogTitle.innerText == "Runtime disconnected") {
        dialog.querySelector("paper-button#ok").click();
        console.log("Reconnecting...");
    } else {
        console.log("ColabReconnect is in service.");
    }
}
timerId = setInterval(ColabReconnect, 60000);

在Colab笔记本中，同时按Ctrl + Shift + I键。将脚本复制并粘贴到提示行中。然后在关闭编辑器之前按Enter。

通过这样做，该函数将每60秒检查一次，看看是否显示屏幕上的连接对话框，如果是，该函数将自动为您单击OK按钮。

我没有单击连接按钮，而是单击评论按钮以保持会话活跃(2020年8月):

function ClickConnect(){

    console.log("Working");
    document.querySelector("#comments > span").click()
}
setInterval(ClickConnect,5000)