DataFrame working in web extension

[rchiodo]

Only difficulty might be in getting the dataframe scripts to run on the remote jupyter machine.

[sadasant]

How is this going:

• On PR (now closed) Web version of the DataFrame #10545 I submitted a version that did work on the web as well as on Node.js, however it did not work in the web in the scenarios where the debuggers allowed inspecting variables in the data viewer.
  • I did try to get it to work with the debuggers, but I couldn't, because running the commands to get the version of pandas was not giving me any result with the debugger, so I undid the debug work initially.
  • I thought I could still get it merged that way, because it would be still allowing the data viewer to work generally on the web, and the web scenario for the debugger's data viewer isn't working currently anyway.
  • But the team helped me realize that the correct step would be to either finish this with the debugger support, or to disable the debugger feature to inspect in the data viewer.
  • I decided to finish the debugger support.
• So, I closed the PR and I'm working on finishing the debugger support here: https://github.com/sadasant/vscode-jupyter/tree/web/9665-6
  • At the moment, most of the code changes are done.
  • However, for the debugger features, either I'm doing something really dumb or there's some unknown bug with the debugger that is preventing it from sending me responses.

I'm getting some help from the team and it is possible I will finish today, but it all depends on the underlying reason of my issue with the debugger.

[sadasant]

After meeting with @DonJayamanne and @rchiodo , we now have a path forward regarding this issue.

Our priority is to solve this issue, so first we will make sure to enable the Data Frame viewer on the web:

• By changing the IDataViewerDependencyService to receive an IKernel besides the PythonEnvironment that it receives today.
• By adding a universal version of the dataViewerDependencyService that would only work if IKernel is provided and throw otherwise an error saying Installation of "pandas" not supported while debugging. Please ensure you have "pandas" installed.
• By keeping the current node-specific version of the dataViewerDependencyService that would extract the interpreter from the IKernel if the IKernel is provided.
• Besides ensuring the dataViewerDependencyService is registered on the web service registry, and removing the conditional that disables the Data Frame on the web.

This approach is a compromise of a more valuable set of changes, which will come with other PRs. You can see the current plan at: #10638