New language server option

[CMLL]

Environment data

• VS Code version: 1.42.0
• Extension version (available under the Extensions sidebar): 2020.6.62710
• OS and version: Ubuntu 19.04
• Python version (& distribution if applicable, e.g. Anaconda): 2.7.15
• Type of virtual environment used (N/A | venv | virtualenv | conda | ...): virtualenv
• Relevant/affected Python packages and their versions: XXX
• Relevant/affected Python-related VS Code extensions and their versions: XXX
• Jedi or Language Server? (i.e. what is "python.jediEnabled" set to; more info How to update the language server to the latest stable version #3977): LanguageServer
• Value of the python.languageServer setting: 0.5.31

Expected behaviour

Setting the new python.languageServer to Microsoft and removing python.jediEnabled should use the corresponding language server.

Actual behaviour

The default value of python.jediEnabled is true so even though python.languageServer is set to Microsoft it still uses the jedi one. To ensure the microsoft one is being used, I need to still keep python.jediEnabled around which I assume is no longer intended to be needed.

Steps to reproduce:

1. Add python.languageServer: 'Microsoft` to settings.
2. Remove python.jediEnabled: False from settings.
3. Reload vscode. Is now using the jedi version of the LS.

[luabud]

Hi Carlos Llamacho (@CMLL)! Thank you for bringing this up. You're right, the behaviour between these two settings is not working well, so we're going to add a word to our docs asking people to set it up only if they wish to turn IntelliSense off while we don't release a fix for it. For now, our recommendation will be to keep using python.jediEnabled setting to select the language server to be used.

[MikhailArkhipov]

Please try insiders build post #11834