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    [Solved] PySide new Mac OS install can't load QtCore.so

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    • D
      dcortesi last edited by

      The problem was that the various Qt<etc>.framework directories did not exist in /Library/Frameworks. I looked at a system where PyQt4 runs and saw that they were there. On this machine, although I ran the Qt installer, it did not place the necessary frameworks in /Library/Frameworks where apparently Python expects them. I used
      @sudo cp -pvR /Developer/SDKs/QtSDK/Desktop/Qt/473/gcc/lib/*.framework /Library/Frameworks@
      to make copies, and immediately, PySide came up.

      I hope this benefits somebody although I have no idea why the Qt installer did not do this.

      ---- original question ---
      New installation of Qt and PySide on a MacPro desktop machine with Snow Leopard. PySide attempts to load QtCore.so (which does exist in the site-packages/PySide folder) but an error occurs:
      @>>> import PySide
      Traceback (most recent call last):
      File "<stdin>", line 1, in <module>
      File "/Library/Python/2.6/site-packages/PySide/init.py", line 2, in <module>
      import private
      File "/Library/Python/2.6/site-packages/PySide/private.py", line 2, in <module>
      from QtCore import __moduleShutdown
      ImportError: dlopen(/Library/Python/2.6/site-packages/PySide/QtCore.so, 2): Library not loaded: QtCore.framework/Versions/4/QtCore
      Referenced from: /Library/Python/2.6/site-packages/PySide/QtCore.so
      Reason: image not found@
      I tried forcing python2.6 to run in 32-bit mode, but this only changed the message to read:
      @ImportError: dlopen(/Library/Python/2.6/site-packages/PySide/QtCore.so, 2): no suitable image found. Did find:
      /Library/Python/2.6/site-packages/PySide/QtCore.so: mach-o, but wrong architecture@

      (I know I am not alone in this experience, as I found the identical issue posted at Quora.com!)

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      • D
        dcortesi last edited by

        Well, a day passes, 23 views, no suggestions. Just to make sure, I downloaded PySide and re-installed it, also re-installed Qt, and rebooted. Symptoms the same (see listing in original post). Several significant things here that I don't understand.

        The first error message is
        @ImportError: dlopen(/Library/Python/2.6/site-packages/PySide/QtCore.so, 2)@
        The second message is
        @Library not loaded: QtCore.framework/Versions/4/QtCore@
        Now the latter exists as part of the Qt SDK. Which I installed in /Developer/SDKs/QtSDK -- which is not the default install location.

        Where does python look for the Qt SDK? Do I need to set some kind of environment variable to help it?

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        • D
          dcortesi last edited by

          I have set a symbolic link ~/QtSDK to where I installed Qt, so it should look as if it was installed in the default location.

          Also I have exported DYLD_LIBRARY_PATH=/Developer/SDKs/QtSDK/Desktop/Qt/473/gcc/lib/

          Neither step makes any difference, the message is the same as before.

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