On 2021-03-01, Greg Ewing <greg.ew...@canterbury.ac.nz> wrote: > On 28/02/21 1:17 pm, Cameron Simpson wrote: >> [its length in bytes] is presented via the object's __len__ method, > >> BUT... It also has a __iter__ value, which like any Box iterates over >> the subboxes. > > You're misusing __len__ here. If an object is iterable and > also has a __len__, its __len__ should return the number of > items you would get if you iterated over it. Anything else > is confusing and can lead to trouble, as you found here.
That was certainly my reaction. Can you imagine the confusion if len() of a list returned the number of bytes required for srorage insttead of the number of elements? >> But is there a cleaner way to do this? > > Yes. Give up on using __len__ to get the length in bytes, > and provide another way to do that. -- https://mail.python.org/mailman/listinfo/python-list
