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"