What is not objects in Python?

[Terry Reedy]

Steven D'Aprano wrote:
> On Mon, 29 Sep 2008 05:41:02 -0700, George Sakkis wrote:
> 
>> For example I would be much less
>> opposed to len() being defined as, say, |x| if "|...|" was a valid
>> operator.
> 
> Arghh! No!!! |x| should be abs(x), not len(x). Just ask mathematicians 
> and physicists.

It should be both, just as + is addition for numbers and concatenation 
for sequences.  Or we could have just one built-in -- size() instead of 
abs() and len().  For non-sequence collections, size() would be better 
than len() anyway.

tjr