Standard way to open a folder window in linux?

Question

I want to open a folder window, in the appropriate file manager, from within a cross-platform (windows/mac/linux) Python application.

On OSX, I can open a window in the

Answer 1

this would probably have to be done manually, or have as a config item since there are many file managers that users may want to use. Providing a way for command options as well.

There might be an function that launches the defaults for kde or gnome in their respective toolkits but I haven't had reason to look for them.