title: numpy requires System Python 2.7 to install
body: <p>I'm trying to learn python (in the process of installing numpy 1.8.0 in order to install BioPython), and am receiving the error "numpy requires System Python 2.7 to install" when I try to put numpy on my HD. I have recently updated my operating system from Mac OS X 10.6 to Mavericks, and am using python 2.7 (although other versions are installed on my computer). I am not an expert in terms of manually installing programs on mac, so there may be a simple solution to this, but I cannot understand why the OS is telling me that the version of python I'm using (for instance, if I type "python -V", the response is "Python 2.7.5") is not there. </p>
  
  <p>Any insights are appreciated!
  Thanks,
  Ryan</p>