[Python] OpenCV Python - No module named cv2 (again)

I know that this question has already been asked here a few times, but since no answer helped me so far, I'm posting it here again.

What I did:

I cloned the repository https://github.com/Itseez/opencv, created and changed to the build directory and compiled OpenCV using the following commands.

cmake -D CMAKE_BUILD_TYPE=RELEASE -D WITH_TBB=ON -D BUILD_opencv_python2=ON -D WITH_V4L=ON -D INSTALL_C_EXAMPLES=ON -D INSTALL_PYTHON_EXAMPLES=ON -D BUILD_EXAMPLES=ON -D WITH_QT=ON -D WITH_OPENGL=ON -D WITH_VTK=ON -D WITH_CUDA=ON -D WITH_CUBLAS=ON -D CUDA_ARCH_BIN="2.0 3.0 3.5" ..
make
sudo make install


Everything compiled fine. Afterwards I added /usr/local/lib to /etc/ld.so.conf.d/opencv.conf and performed sudo ldconfig. Finally, I added

PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/usr/local/lib/pkgconfig
export PKG_CONFIG_PATH


to my local bashrc. Everything worked fine and I also can execute the cpp examples, but as soon as I try a python example or try using OpenCV in python myself, I get:

ImportError: No module named cv2
​

Things I tried based on other posts:

1. 
   Manually copy cv2.so to /usr/local/lib/python2.7/dist-packages: Did not work because I cannot find cv2.so anywhere.
   
   
2. 
   Missing numpy or multiple versions of numpy: No problem here, because I only have one version of numpy.
   

Additional:

I also tried the same steps with the most recent sources from the homepage: same result.

I found several ressources saying that the correct flag is BUILD_NEW_PYTHON_SUPPORT now and not BUILD_PYTHON_SUPPORT, like it was in earlier version. Since both didn't work for me, I used BUILD_opencv_python2. Is that correct?

So, what could be the problem here? I mean, except the fact that there is no cv2.so anywhere on my machine. Btw, I use Ubuntu 14.04.

Thanks in advance.

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