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I'm new to Ubuntu but I failed to solve this error. I had searched for this problem but I didn't find the perfect solution. Please help me. I'm finding this error. Please give me a perfect solution because this error doesn't let me to install any software. The error is:

the following packages have unmet dependencies:

software-properties-kde: Depends: python3 (>= 3.2.3-3~) but 3.3.1-0ubuntu1 is to be installed
                         Depends: python3-pyqt4 but it is not going to be installed"
Alaa Ali
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mohsin
  • 103

2 Answers2

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Open Terminal and issue this command

sudo apt-get update && sudo apt-get upgrade 
sudo apt-get install -f 
KK Patel
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with the launchpad error, have you tried changing the selected 'other software' in Software Updater?

It's probably been selected by some program as a source there, so uncheck entries that refer to launchpad.