When do default parameters get their values set?

[random832 at fastmail.us]

On Wed, Dec 10, 2014, at 21:18, Rustom Mody wrote:
> But I have a different question -- can this be demonstrated without the
> 'is'?

Er, yeah. You can, for example, add an item to one of the dictionaries
and observe that it's not present in the other.