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September 2017

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ANN: PyObjC 4.0
by Ronald Oussoren Sept. 25, 2017

Sept. 25, 2017

Hi, I’m happy to announce PyObjC 4.0. The major difference in this release is support for new APIs and frameworks introduced in macOS 10.13 (High Sierra). A minor change is that the documentation is now on readthedocs: <http://pyobjc.readthedocs.io/en/latest/ <http://pyobjc.readthedocs.io/en/latest/>> The release notes <http://pyobjc.readthedocs.io/en/latest/changelog.html <http://pyobjc.readthedocs.io/en/latest/changelog.html>> contain more detailed information on what has changed. And finally a technical note: this release was cut from the macos10.13-support branch of the repository, I haven’t merged the branch back into default yet. Ronald

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Tkinter and PyObjC
by Ronald Oussoren Sept. 6, 2017

Sept. 6, 2017

Hi, I’m kind of hoping that a Tkinter or Tk expert is reading this… A PyObjC user tries to call Tkinter from a Cocoa program (that is, the Cocoa runloop starts before the Tkinter one) and gets an error message: -[NSApplication _setup:]: unrecognized selector sent to instance Furthermore the Tkinter GUI doesn’t work. PyObjC’s issue about this: https://bitbucket.org/ronaldoussoren/pyobjc/issues/201/tkinter-method-tk-fa… I’ve done some quick browsing of the Tk source code and it appears that Tk assumes that -[NSApplication sharedApplication] returns an instance of a Tk-specific private subclass of NSApplication and that won’t be true when the Tk runloop is started before the Cocoa one. My question: is my analysis correct? And has anyone successfully mixed PyObjC and Tkinter in this way? I guess this issue could be avoided by initialising Tk before calling into Cocoa. Ronald

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