Best form of iterating over a lsit of lists

[tonymcgregor]

Thanks for your reply.

I get that 'a', 'b', 'c' in is a tuple. But is name, species, weight also a tuple in the following?

name, species, weight = pets[0]

In this case name, species, weight is the left hand side of an assignment. I wouldn't have thought it was a tuple but if it is, it isn't an "ordinary" tuple. You can't, of course, write (2, 3, 4) = something

So I still have the sense I'm missing something.