How to specify start path for Gtk?


Suppose I want to open some folder on my system. But I do not want to start at the Desktop directory all the time, I would rather like to start at a specific place, C:\user\my\specific\point etc. Currently my code is:

folders = open_dialog("Select Dataset Folder", action=GtkFileChooserAction.SELECT_FOLDER,select_multiple=true)

Kind regards