Namedtuples: some unexpected inconveniences

[Deborah Swanson]

Gregory Ewing wrote, on Thursday, April 13, 2017 12:17 AM
> 
> Deborah Swanson wrote:
> > But I think you got it right in your last sentence below. 
> defaultdict 
> > copied them because they were immutable,
> 
> No, definitely not. A defaultdict will never take it upon 
> itself to copy an object you give it, either as a key or a value.
> 
> The copying, if any, must have occurred somewhere else, in
> code that you didn't show us.
> 
> Can you show us the actual code you used to attempt to
> update the namedtuples?
> 
> -- 
> Greg

As I just told Peter, I just discovered earlier today that all of that
code is lost, and it will take awhile to rewrite. And now I have several
reasons to do so.

I don't know how long it will take, but I will come back and produce the
code that gave me this behavior.