On Fri, Jun 1, 2018 at 12:37 AM, Frank Millman <fr...@chagford.com> wrote: > "Steven D'Aprano" wrote in message news:peorib$1f4$2...@blaine.gmane.org... >> >> >> On Thu, 31 May 2018 10:05:43 +0200, Frank Millman wrote: >> >> > From the interpreter session below, you will see that adding a key while >> > processing the *last* key in an OrderedDict does not give rise to an >> > exception. >> >> If you mutate the dict, and then stop iterating over it, there is no >> check that the dict was mutated. >> >> It isn't an error to mutate the dict. It is an error to mutate it while >> it is being iterated over. If you stop the iteration, there's no problem. >> > > Agreed, but my gut feel, and the following example, suggest that when > processing the last key in a dictionary while iterating over it, you have > not yet stopped iterating.
If it's easier to understand, here's an alternative wording: It is an error to mutate the dictionary *and then continue to iterate over it*. ChrisA -- https://mail.python.org/mailman/listinfo/python-list
