where are isinstance types documented?

[Fredrik Lundh]

Sion Arrowsmith wrote:
>

>> based on http://docs.python.org/ref/types.html, here's a list of the 
>> most commonly used core types:
>> [ ... ]
>> Sequences:
>>     str
>>     unicode
>>     tuple
>>     list
> 
> And set, presumably.

absolutely!

however, sets don't seem to be mentioned on that page at all (and if 
they were, they should be under mappings, right?).  any documentation 
hackers out there ?

</F>