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Can't see output when web command fails
Create flask project.
Make sure you don't have flask installed in your selected python environment.
Right click project node and select Web->Start server or Web->Start debug server.
Command window will come up with an error stating flask isn't installed, but you'll need superhuman vision to see that error, because the command window disappears immediately.
It would be nice if to have a way for the user to see the output, especially (or only?) when there's a failure. Either a pause at the end, or tee the output to VS output window.