On Sat, Sep 12, 2015 at 4:26 PM, Ben Finney <ben+pyt...@benfinney.id.au> wrote: > If you do agree with those, some corollaries follow: > > * Container types do not contain objects. > > It is a useful analogy to say the objects are “in” the container; but > that would imply they are not simultaneously in any other container. > That's not true, so it's a flawed (though very useful) analogy.
It's so useful that we have an operator called "in", implemented using a magic method "__contains__", to test exactly that concept. As long as you understand that containment here really means something more like "is accessible from", it's correct. Flawed in a minor way, but so extremely convenient that it's not worth going for complete technical correctness. ChrisA -- https://mail.python.org/mailman/listinfo/python-list
