Using numpy with PyDev
I recommend you to either use the setup.py from the downloaded archive or to download the "superpack"-executable for windows, if you work on windows anyway.
In PyDev, i overcame problems with new libraries by using the autoconfig button. If that doesn't work, another solution could be deleting and reconfiguring the python interpreter.
Although I've been doing things with python by myself for a while now, I'm completely new to using python with external libraries. As a result, I seem to be having trouble getting numpy to work with PyDev.
Right now I'm using PyDev in Eclipse, so I first tried to go to My Project > Properties > PyDev - PYTHONPATH > External  Libraries > Add zip/jar/egg, similar to how I would add libraries in Eclipse. I then selected the numpy-1.9.0.zip file that I had downloaded. I tried importing numpy and using it, but I got the following error message in Eclipse:

Undefined variable from import: array.

I looked this up, and tried a few different things. I tried going into Window > Preferences > PyDev > Interpreters > Python Interpreters. I selected Python 3.4.0, then went to Forced Builtins > New, and entered "numpy". This had no effect, so I tried going back to Window > Preferences > PyDev > Interpreters > Python Interpreters, selecting Python 3.4.0, and then, under Libraries, choosing New Egg/Zip(s), then adding the numpy-1.9.0.zip file. This had no effect. I also tried the String Substitution Variables tab under Window > Preferences > PyDev > Interpreters > Python Interpreters (Python 3.4.0). This did nothing.
Finally, I tried simply adding # @UndefinedVariable to the broken lines. When I ran it, it gave me the following error:

ImportError: No module named 'numpy'

What can I try to get this to work?