Windows: Provide an option to disable search in CWD on `shutil.which`

I would like to search for an executable in the PATH but not from the current working directory (cwd). By default, as documented in shutil.which, it prepends the cwd before PATH, so it's not possible to get the expected executable.

For example, I have a whoami.exe in the cwd but I would like to get the one from the system32 directory; there's no way to do so using shutil.which.

>>> import shutil
>>> shutil.which('whoami')
'.\\whoami.EXE'

I think it makes sense for that to be the default behaviour since that's how it is on Windows. I would like to have a parameter to disable this behaviour in shutil.which.

Thanks!

從 shutil.which 入口點及其文件開始，聚焦於 issue 中描述的 Windows 特定目前目錄搜尋。當呼叫端可以選擇退出該搜尋，並在 PATH 中較後的位置找到相符的可執行檔（包括 whoami.exe 範例）時，即表示完成。