Python applications using QT crashing

yucht · 2013-05-06 20:09:14

When I run a program such as ipython with the qt interface or picard, I get import errors with the QtGui.so library. I've tried reinstalling the python-pyside, python-pyside-tools, python2-pyqt, and pyqt packages, to no avail.

$ ipython qtconsole
Traceback (most recent call last):
  File "/usr/lib/python3.3/site-packages/IPython/external/qt.py", line 40, in <module>
    from PySide import QtCore, QtGui, QtSvg
ImportError: /usr/lib/python3.3/site-packages/PySide/QtGui.so: undefined symbol: _ZTI9QGtkStyle

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/lib/python3.3/site-packages/IPython/external/qt.py", line 46, in <module>
    from PyQt4 import QtCore, QtGui, QtSvg
ImportError: /usr/lib/python3.3/site-packages/PyQt4/QtGui.so: undefined symbol: _ZN15QSessionManager16staticMetaObjectE

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/bin/ipython", line 9, in <module>
    load_entry_point('ipython==0.13.2', 'console_scripts', 'ipython3')()
  File "/usr/lib/python3.3/site-packages/IPython/frontend/terminal/ipapp.py", line 388, in launch_new_instance
    app.initialize()
  File "<string>", line 2, in initialize
  File "/usr/lib/python3.3/site-packages/IPython/config/application.py", line 84, in catch_config_error
    return method(app, *args, **kwargs)
  File "/usr/lib/python3.3/site-packages/IPython/frontend/terminal/ipapp.py", line 313, in initialize
    super(TerminalIPythonApp, self).initialize(argv)
  File "<string>", line 2, in initialize
  File "/usr/lib/python3.3/site-packages/IPython/config/application.py", line 84, in catch_config_error
    return method(app, *args, **kwargs)
  File "/usr/lib/python3.3/site-packages/IPython/core/application.py", line 325, in initialize
    self.parse_command_line(argv)
  File "/usr/lib/python3.3/site-packages/IPython/frontend/terminal/ipapp.py", line 308, in parse_command_line
    return super(TerminalIPythonApp, self).parse_command_line(argv)
  File "<string>", line 2, in parse_command_line
  File "/usr/lib/python3.3/site-packages/IPython/config/application.py", line 84, in catch_config_error
    return method(app, *args, **kwargs)
  File "/usr/lib/python3.3/site-packages/IPython/config/application.py", line 420, in parse_command_line
    return self.initialize_subcommand(subc, subargv)
  File "<string>", line 2, in initialize_subcommand
  File "/usr/lib/python3.3/site-packages/IPython/config/application.py", line 84, in catch_config_error
    return method(app, *args, **kwargs)
  File "/usr/lib/python3.3/site-packages/IPython/config/application.py", line 352, in initialize_subcommand
    subapp = import_item(subapp)
  File "/usr/lib/python3.3/site-packages/IPython/utils/importstring.py", line 40, in import_item
    module = __import__(package,fromlist=[obj])
  File "/usr/lib/python3.3/site-packages/IPython/frontend/qt/console/qtconsoleapp.py", line 56, in <module>
    from IPython.external.qt import QtCore, QtGui
  File "/usr/lib/python3.3/site-packages/IPython/external/qt.py", line 57, in <module>
    raise ImportError('Cannot import PySide >= 1.0.3 or PyQt4 >= 4.7')
ImportError: Cannot import PySide >= 1.0.3 or PyQt4 >= 4.7

or

$ picard
Traceback (most recent call last):
  File "/usr/bin/picard", line 2, in <module>
    from picard.tagger import main; main('/usr/share/locale', True)
  File "/usr/lib/python2.7/site-packages/picard/tagger.py", line 21, in <module>
    from PyQt4 import QtGui, QtCore
ImportError: /usr/lib/python2.7/site-packages/PyQt4/QtGui.so: undefined symbol: _ZN15QSessionManager16staticMetaObjectE

It seems like there might have been a problem in linking. How can I fix this?

mike_r · 2013-05-06 20:48:30

I don't get this behavior, but I have only pyqt installed. It appears that you have both pyside and pyqt installed - I thought they were supposed to be mutually exclusive. Does having both cause some lib conflict? You might try uninstalling both, then reinstalling just one of them.

Mike

yucht · 2013-05-06 23:27:39

I get the same errors with only one of the two packages installed. Additionally (as you might expect) I get an import error for PyQt4 or PySide when one of them is missing when starting iPython rather than the error with QtGui.so above.

Mr.Elendig · 2013-05-07 13:23:47

You have to rebuild pyside when there is a update to QT

Also check that your qt packages and pyqt is up to date (check against archlinux.org/packages)

Last edited by Mr.Elendig (2013-05-07 13:24:51)

fahrenheit · 2013-09-12 09:57:44

Sorry for reviving the thread but I'm having the same exact error with several applications.
Tried re-installing pyqt4-common, python2-pyqt4 and python-pyqt to no avail.

Anyone has some idea to what could be causing this issue and how to solve it?

Regards

Mr.Elendig · 2013-09-12 12:16:43

You should create a new thread and post the full traceback etc.

Arch Linux

#1 2013-05-06 20:09:14

Python applications using QT crashing

#2 2013-05-06 20:48:30

Re: Python applications using QT crashing

#3 2013-05-06 23:27:39

Re: Python applications using QT crashing

#4 2013-05-07 13:23:47

Re: Python applications using QT crashing

#5 2013-09-12 09:57:44

Re: Python applications using QT crashing

#6 2013-09-12 12:16:43

Re: Python applications using QT crashing

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