Julian added the comment:
Thank you, Antoine, you make a good point.
In my example, I am suppressing the warning, which, I agree isn't a good idea.
In my real life usage, I was getting an unexpected exception in a callback in
code written by another person. I wanted not to suppress the warnin
Antoine Pitrou added the comment:
The behaviour of weakrefs here mirrors what is already done for __del__
exceptions. Using warnings would mean that exceptions can get silenced
implicitly (for example, if an exception happens twice at the same location)
which is not very Pythonic: generally,
New submission from Julian :
If a weakref callback raises an exception, weakref writes out some text (to
stderr, I think) and ignores it.
I think it would be more appropriate if weakref emitted that text using the
Python warning module, to allow it to be better controlled.
Consider this code
