Re: [Pyobjc-dev] Python defined type in C code

[Ronald O. <ron...@ma...>]

On 30 Aug, 2010, at 15:23, Ken Brooks wrote:

> I am making a package that consists of one module written in C and two others written in Python. The C module has functions that should take parameters of a class type written in one of the Python modules. What is the most appropriate way of dealing with this? How can I "import" a Python module into my C context?

The easiest way is to define a base class in Objective-C and implement the python class as a subclass of that class:

In ObjC:

@interface MyObject : NSObject
{
}

-(id)myMethod;
@end
@implementation MyObject
// No method implementation here
@end

In Python:

class MyRealObject (objc.lookUpClass("MyObject")):
   def myMethod(self):
       print "Doing it"


Then design the C API to accept instances of the ObjC base class. The primary advantage of this approach is that this gets you the right prototypes in the C code.

BTW. All of this assumes that you're using PyObjC and that your "C" code is actually Objective-C.

Ronald


> 
> Ken 
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