Re: Cocoa Python broken in Leopard??

FROM : Bill Bumgarner
DATE : Wed Nov 07 08:58:29 2007

On Nov 6, 2007, at 11:49 PM, Uliano Guerrini wrote:
> with every Xcode project template involving Python it is enough to 
> add an
>
> import Quartz
>
> to any python file to hang the application with the icon jumping in 
> the dock.
> From logs on the console it seems that the application isn't able to 
> connect to the window server

.... error messages deleted ....

Python's "import" works quite a bit differently than Objective-C's 
#import.  Namely, it will execute any code found in the imported 
modules that appears within the module's scope.

The Quartz module requires a viable window server connection to be set 
up.  If you import Quartz in main.py or at the top level of your 
application delegate source file (or anywhere that is imported as a 
part of the app launching process prior to control being passed to the 
appkit), it'll blow up as you have seen.

Instead, import Quartz in response to application initialization.  I 
dropped "import Quartz" into the standard Cocoa Python Application's 
applicationDidFinishLaunching_() method and it no longer bombs (I 
didn't test much further than that):

class FoobarAppDelegate(NSObject):
    def applicationDidFinishLaunching_(self, sender):
        import Quartz
        NSLog("Application did finish launching.")

b.bum