'isa' keyword

[Colin J. Williams]

Rocco Moretti wrote:
> Terry Hancock wrote:
> 
>> On Thursday 01 September 2005 07:28 am, Fuzzyman wrote:
>>
>>> What's the difference between this and ``isinstance`` ?
>>
>>
>> I must confess that an "isa" operator sounds like it would
>> have been slightly nicer syntax than the isinstance() built-in
>> function. But not enough nicer to change, IMHO.
> 
> 
> Especially conidering that checking parameters with "isinstance" is 
> considered bad form with Python's duck typing.
Rocco,

Could you elaborate on that please?

Colin W.