Re: [Pyobjc-dev] import QTKit -> NSRecursiveLock errors

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

On 25 Jun, 2009, at 16:38, Dirk Stoop wrote:

> On Jun 25, 2009, at 8:02 AM, Ronald Oussoren wrote:
>
>> However, if you use py2app it should detect 'import' statements in
>> function bodies as well as at the global level. I'd consider it a bug
>> when it doesn't detect import statements in a function/method body.
>
> Ahh.  Thanks for the clarification.  I use code like the example  
> below in some places in Checkout, so those must be the only places  
> where py2app – understandibly – misses stuff:
>
> exec("import %s" % someClassName)
> exec("instance = %s.alloc().init()" % someClassName)

That's right. Py2app can only detect imports using the import  
statement, those are easily detectable by scanning the bytecode of a  
module. Another relativly common way to import code in very dynamic  
modules is:

mod = __import__(someClassName)

This emits a regular function call in the bytecode and cannot be  
detected by py2app.

BTW. I would use that mechansm rather than your exec statements to  
dynamicly import code:

m = __import__(someClassName)
instance = getattr(m, someClassName).alloc().init()

Ronald

>
> - Dirk