Re: [Pyobjc-dev] Calling function with variable number of arguments?

[Pierce T.W. I. <pi...@tw...>]

On Apr 27, 2004, at 12:52 PM, Ronald Oussoren wrote:

>
> On 27-apr-04, at 21:19, Pierce T.Wetter III wrote:
>
>>
>>  So this line is giving me an error:
>>
>> qual= ObjectModel.EOQualifier.qualifierWithQualifierFormat_('fund =  
>> %@ and date >= %@',fund,now60)
>>
>> TypeError: Need 1 arguments, got 3
>>
>>  (1.1 b2 downloaded about 15 minutes ago)
>>
>>  Presumably because qualifierWithQualifierFormat takes a variable  
>> number of arguments.
>>
>>  Is there some sort of voodoo I can do to get this to work?
>
> The easiest solution is to do the formatting on the python side:
>
> qual= ObjectModel.EOQualifier.qualifierWithQualifierFormat_('fund = %s  
> and date >= %s'%(fund,now60))
>
> It is possible to write C code that would allow you to pass in a  
> variable number of arguments, but you would have to implement most of  
> the format-string parsing in the wrapper.

  Yeah, that doesn't work, because it just looks like a format string,  
its actually parsed. For instance, an AND in the string produces an  
EOAndQualifier etc.

  What I did instead was add this in a category to EOQualifier:

+ (EOQualifier *) qualifierWithQualifierFormat: (NSString *) string  
arg1: (id) arg1 arg2:(id) arg2
{

	return [self qualifierWithQualifierFormat: string,arg1,arg2];
}

Though that's a hack obviously.

I wonder if it would be possible to do something like this:

objc.makeVarArgsCall(ObjectModel.EOQualfier,"qualifierWithQualifierForma 
t_",('fund = %s and date >= %s',fund,now60))

That is, add a method to the objc module that takes an object, a  
selector and a list of arguments and makes the call?

Pierce