Permit import of .pyw under Linux

Feature or enhancement

To allow under Linux the execution of a script written under Windows, importing modules, some of which have the .pyw file extension, it would be useful to allow linux to import the .pyw files.

Pitch

Sometimes you want to run under linux a script written under windows which import modules, some having the file extension ".pyw". Today, we are forced to rename all pyw files to py to switch from Windows to Linux. But this is not always desirable, if you use a third party script or if you work cooperatively on a project, with developers under Windows and Linux. Moreover, there is no solution to recognize the py files to be renamed to pyw when you want to switch back to Windows.

Previous discussion

Importing .pyw files has been discussed here :
https://mail.python.org/pipermail/patches/2001-August/005411.html
And it is mentioned that "with slight modification, it could
permit the extension on any platform if desired"

Another discussion on the subject :
https://stackoverflow.com/questions/21386094/importing-pyw-files-as-modules-under-linux

未指定任何實作檔案、測試或進入點。首先檢視 Python 在 Linux 下對 .pyw 檔案的匯入行為以及連結的兩項討論；定義跨平台行為，並新增測試以證明不需要重新命名檔案即可成功匯入。