Any workaround is appreciated! Thank you.

related issue: neoclide/coc.nvim#1382

To use python.upgradePythonLanguageServer behind http proxy, you need two steps:

1. Set environment variables: http_proxy and https_proxy with scheme(ex: export http_proxy=http://myproxy:8080 && export https_proxy=http://myproxy:8080
2. Set http.proxy in coc-settings.json with scheme like as below:

{
    "http.proxy": "http://myproxy:8080"
}

remember, both configs need scheme!

BTW, request loads proxy address from environment variables by default. I think this code removes it.

https://github.com/neoclide/coc-python/blob/master/src/common/net/httpClient.ts#L15

FYI, coc.nvim uses npm directry so this problem doesn't reproduce.

https://github.com/neoclide/coc.nvim/blob/master/src/model/extension.ts#L90

Thank you very much!
This worked for me very well! Is it possible to add it at least to the GitHub Readme.md?