pyobjc-dev

[Pyobjc-dev] How to do isKindOfClass:? (and a bug fix)

[Bill B. <bb...@co...>]

The NSStringFromClass() function in Foundation was misnamed as 
NSClassFromString() -- breaking the original implementation of that 
function.  Fixed.

I added a propertyListFromPythonCollection() function to the 
Foundation.   It is just a copy/paste of what was previously committed 
in the example.

I was going to go ahead and write the obvious 
pythonCollectionFromPropertyList() function, but ran into a problem.

[bumbox:~/bbum-developer/sourceforge/pyobjc] bbum% python
Python 2.2 (#1, 07/14/02, 23:25:09)
[GCC Apple cpp-precomp 6.14] on darwin
Type "help", "copyright", "credits" or "license" for more information.
 >>> from Foundation import *
 >>> mD = NSMutableDictionary.dictionary()
 >>> mD
<NSCFDictionary objective-c instance 0x161cf0>
 >>> mD.__class__
<objective-c class NSCFDictionary at 0x8db130>
 >>> mD.isKindOfClass_(NSClassFromString("NSDictionary"))
0
 >>> NSClassFromString("NSDictionary")
<objective-c class NSDictionary at 0x82f3b0>
 >>> mD.isKindOfClass_("NSDictionary")
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
TypeError: expected a ObjC class or None for argument 1: its typespec 
is '#'
 >>> mD.isKindOfClass_(NSDictionary)
0
 >>> NSDictionary
<objective-c class NSDictionary at 0x82f3b0>

(If you are running the unpatched version of PyObjC, you'll need to use 
lookup_class, not NSClassFromString()).

b.bum

Re: [Pyobjc-dev] How to do isKindOfClass:? (and a bug fix)

[Ronald O. <ous...@ci...>]

You can do 'isinstance(NSDictionary, mD)'.

I'd expect that isKindOfClass: also works, I'll look into why it 
doesn't.

Ronald

Re: [Pyobjc-dev] How to do isKindOfClass:? (and a bug fix)

[Bill B. <bb...@co...>]

Doesn't appear to work either -- likely because we both reversed the 
arguments... :-)

 >>> isinstance(d, NSDictionary)
1

(This was what I was originally going to send)

[bumbox:V3/OSX-Desktop/Intent] bbum% python
Python 2.2 (#1, 07/14/02, 23:25:09)
[GCC Apple cpp-precomp 6.14] on darwin
Type "help", "copyright", "credits" or "license" for more information.
 >>> from Foundation import *
 >>> d = NSMutableDictionary.dictionary()
 >>> d
<NSCFDictionary objective-c instance 0x161ae0>
 >>> isinstance(NSDictionary, d)
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
TypeError: isinstance() arg 2 must be a class or type
 >>> isinstance(NSDictionary, type(d))
0
 >>> isinstance(NSDictionary, d.__class__)
0
 >>> d
<NSCFDictionary objective-c instance 0x161ae0>

thanks!

On Thursday, October 17, 2002, at 04:45 AM, Ronald Oussoren wrote:

> You can do 'isinstance(NSDictionary, mD)'.
>
> I'd expect that isKindOfClass: also works, I'll look into why it 
> doesn't.
>
> Ronald