how to test if an object came from os.walk()

[Skaperen]

so, i'd have to get the generator to yield one or more results and see if they look OK. maybe just one, so i can still modify it if i need to. then i would look to see if i get a 3-tuple with (string,list,list). the simplest way to do this is probably apply that check each time and raise TypeError if it is not.

i am writing a generator to fully flatten the tree. i have many use cases for flat trees. i will probably have a number of callbacks to apply caller tests (i hope a generator lets me do that).