[Pythonmac-SIG] QuickTime.Qt beta & SequenceGrabber, anybody use it?

[Bob Ippolito]

On Aug 17, 2004, at 2:00 AM, Ronald Oussoren wrote:

>
> On 17-aug-04, at 0:07, Jack Jansen wrote:
>
>>
>> On 16 Aug 2004, at 23:50, Jerome wrote:
>>
>>> thanks, that's a start, problem is the
>>> Carbon.Cm.OpenDefaultComponent() won't allow a 0 for 2nd argument to
>>> allow any subtype, so i dont know how to try my example otherwise,
>>> putting other subtypes just get null componentInstances
>>
>> You should pass '\0\0\0\0': OSType values (the ubiquitous 4-char 
>> single quoted strings in C) must be strings on the Python side.
>>
>> I keep going back and forward on this design: sometimes I want to 
>> allow integers too, sometimes I think it's too error-prone and want 
>> to keep things the way the are, sometimes I want to do something 
>> in-between (such as allow only 4-char Python strings or the specific 
>> integer values 0 and maybe -1).
>
> Some newer API's return OSType values as part of a dictionary, such as 
> the Cocoa file management API's. PyObjC converts those in integers, 
> because it doesn't know better.

I forgot about that one.

>> Anyone have any opinions on this?
>
> Maybe a subclass of 'int' that accepts 4-character-codes? I have one 
> python one lying around that also has a custom __repr__ and __str__.
>
> Or accept either, that would be backward compatible.

Me too, except mine is a subclass of str that accepts integers :)

-bob