Comments on: PyObjC First Steps http://bob.pythonmac.org/archives/2005/07/05/pyobjc-first-steps/ Bob's Rants Fri, 25 Jul 2008 16:07:31 +0000 http://wordpress.org/?v=2.5.1 By: Bob Ippolito http://bob.pythonmac.org/archives/2005/07/05/pyobjc-first-steps/#comment-2347 Bob Ippolito Tue, 05 Jul 2005 09:11:45 +0000 /?p=154#comment-2347 In most cases you probably want that promoted to an exception anyway, so I tend not to bother with checking-for-None. In most cases you probably want that promoted to an exception anyway, so I tend not to bother with checking-for-None.

]]> By: Ronald Oussoren http://bob.pythonmac.org/archives/2005/07/05/pyobjc-first-steps/#comment-2346 Ronald Oussoren Tue, 05 Jul 2005 08:47:09 +0000 /?p=154#comment-2346 Initializer should be written like this (note the extra if statement): <code> class Foo (NSObject): def init(self): self = super(Foo, self).init() if self is None: return None self.x = 42 return self </code> The assigment to self and the subsequent test are necessary because several Cocoa classes return a different self from the initializer or return <code>nil</code> if initialization failed. Initializer should be written like this (note the extra if statement):


class Foo (NSObject):
def init(self):
self = super(Foo, self).init()
if self is None: return None

self.x = 42
return self

The assigment to self and the subsequent test are necessary because several Cocoa classes return a different self from the initializer or return nil if initialization failed.

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