On Apr 11, 4:25 pm, Tim Chase <python.l... at tim.thechases.com> wrote: > Finally, if it were added, I'd call it something like merge() Guido rejected merge() a long time ago. Anyway, there is a new ChainMap() tool in the collections module for Py3.3 that should address a number of use cases for handling default values. Raymond twitter: @raymondh