Results 1 to 4 of 4

Thread: Python throws "symbol... not defined" errors

  1. #1
    Join Date
    Jan 2012
    Location
    San Francisco/Chicago
    Posts
    16

    Default Python throws "symbol... not defined" errors

    I have spent several hours searching for understanding that works. Nothing to date. I'm running 42.1 with current updates. Python 2.7; I have installed it from Yast, not source. I also have Python 3.5 installed (from Yast). This problem appears in several python apps over the last few months. The latest was trying to set up youtube-dl-gui.

    A very simple test may serve to show the general issue most clearly:

    Code:
    vsl:/home/rufus/_Install-Media/Utility/youtube-dl-gui-master # python
    Python 2.7.12 (default, Jul 01 2016, 15:34:22) [GCC] on linux2
    Type "help", "copyright", "credits" or "license" for more information.
    >>> import wx
    Traceback (most recent call last):
      File "<stdin>", line 1, in <module>
      File "/usr/lib64/python2.7/site-packages/wx-3.0-gtk2/wx/__init__.py", line 45, in <module>
        from wx._core import *
      File "/usr/lib64/python2.7/site-packages/wx-3.0-gtk2/wx/_core.py", line 4, in <module>
        import _core_
    ImportError: /usr/lib64/python2.7/site-packages/wx-3.0-gtk2/wx/_core_.so: symbol _ZN30_WX_LIST_HELPER_wxMenuItemList14DeleteFunctionEP10wxMenuItem, version WXU_3.0 not defined in file libwx_gtk2u_core-suse.so.1 with link time reference
    >>>
    For reference, here is the output from attempt to set up the app:

    Code:
    vsl:/home/rufus/_Install-Media/Utility/youtube-dl-gui-master # python setup.py install
    /usr/lib64/python2.7/site-packages/wx-3.0-gtk2/wx/_core_.so: symbol _ZN30_WX_LIST_HELPER_wxMenuItemList14DeleteFunctionEP10wxMenuItem, version WXU_3.0 not defined in file libwx_gtk2u_core-suse.so.1 with link time reference
    Please advise. (I would include zypper listings but the forum 'ware doesn't like so many characters.)


    Thanks

    Rufus

  2. #2

    Default AW: Python throws "symbol... not defined" errors

    Such "symbol lookup errors" are typical symptoms of mixing (incompatible) packages from different repos.

    One of the main "usual suspects" for problems of this kind are wxWdigets/wxGTK packages, which seems to be the case here.

    Code:
      File "/usr/lib64/python2.7/site-packages/wx-3.0-gtk2/wx/_core.py", line 4, in <module>
        import _core_
    ImportError: /usr/lib64/python2.7/site-packages/wx-3.0-gtk2/wx/_core_.so: symbol _ZN30_WX_LIST_HELPER_wxMenuItemList14DeleteFunctionEP10wxMenuItem, version WXU_3.0 not defined in file libwx_gtk2u_core-suse.so.1 with link time reference
    So you should take a look where all of your "wxwidgets" or "wxgtk" packages are coming from, looks like the one providing the "libwx_gtk2u_core-suse.so.1" and the one providing the wx-3.0-gtk2 modules are not compatible, i.e. unicode build vs. non-unicode build, at least two different versions available atm. (2.8 vs. 3.0) and several other compile time options (which make wxGTK/wxWidget packages one of the "usual suspects" for such problems).

    AK

    P.S. You could use a pastebin service for longer outputs, IIRC there is one suggested in the forum's faq.

  3. #3

    Default AW: Python throws "symbol... not defined" errors

    Addendum:

    Youtube-dl-gui from here?

    https://github.com/MrS0m30n3/youtube-dl-gui

    Works for me™ (on 42.1) with

    python: 2.7.12

    libwx_gtk2u_core-suse1: 3.0.2

    and (that might be the important one)

    python-wxWidgets: 2.8.12.1

    AK

    P.S. "Works" only means the program starts normal without any "symbol lookup error", I did not check any of its functionality as I prefer to use youtube-dl via CLI.

  4. #4
    Join Date
    Jan 2012
    Location
    San Francisco/Chicago
    Posts
    16

    Default Re: Python throws "symbol... not defined" errors

    @Akoellh

    Thanks for your quick notes. Sorry for delayed reply - I thought I'd get email notifications on replies to thread. I'll investigate the repositories this evening.


    Rufus

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •