How to use the OS's native file selector in Tkinter

[copx]

Hi,

I would like to use the native file selector of the "host OS" for the "Open 
File" function of my Python/Tkinter app. Could anyone tell me how to do 
this?
My primary target platform is Windows. So a Windows-only solution would be 
ok (IIRC Linux doesn't even have a "native file selector").

copx