Moreover, output from PurePosixPath.as_posix() is not that straightforward?
Please take a look below example from python3.6 + linux + docker
```
>>> winPath = r'\workspace\xxx\test_fixture\user-restore-success.zip'
>>> pWIN = pathlib.PureWindowsPath(winPath)
>>> pppFromWinPath = pathlib.PurePosixPath(winPath)
>>> pppFromPwp = pathlib.PurePosixPath(pWIN)
>>> pppFromWinPath.as_posix()
'\\workspace\\xxx\\test_fixture\\user-restore-success.zip'
>>> pppFromPwp.as_posix()
'\\/workspace/xxx/test_fixture/user-restore-success.zip'
```
* Construction PurePosixPath from rawString, `as_posix()` gives '\\workspace\\xxx\\test_fixture\\user-restore-success.zip'
* Construction PurePosixPath from PureWindowsPath, `as_posix()` gives '\\/workspace/xxx/test_fixture/user-restore-success.zip' |