[Python-ideas] Dictionary views are not entirely 'set like'

[Chris Angelico]

On Wed, Apr 6, 2016 at 11:03 PM, Rob Cliffe <rob.cliffe at btinternet.com> wrote:
> Something has changed then, because in Python 2.7.10 I get
>     ##1,3     TypeError
>     ##9,10   True
> I can't see anything wrong with the actual behaviour in any of the examples.

Python 2.7 has very different handling of .keys() and .values() on
dictionaries - they return lists instead of views. You can ignore 2.7
for the purposes of this discussion - it's not "set-like" in the way
that's being considered here.

ChrisA