BartC wrote:
What's bothering me is:
...
* The insistence (I think largely from Steven) that the way this feature
works is good rather than bad
Here's one reason to prefer the way it currently works:
It's rare to want a mutable default value. The vast
majority of default values are simple things such as
None, 0 or "". Evaluating the default expression on
every call in those cases would just be useless
overhead. So Python optimises for the most common
case. When you need a mutable default, there is a
straightforward way to get it.
--
Greg
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