how to add custom importer after the normal imports

[Gelonida N]

Hi,


I just read about sys.meta_path, which allows to install custom 
importers *BEFORE* the default importers.

However I have a use case where I would like to add a custom importer 
*AFTER* all other import methods have failed.

Does anybody know how to do this.

One way of implementing this would be to add the default importer as 
first entry in sys.meta_path. My only problem is, that I don't know how 
to create a 'default-importer', such that I can add it into sys.meta_path

Thanks in advance for any suggestions