title: Python3 can't find scipy, numpy, ipython
body: <p>I have CentOS6 and didn't see any "python3" listed by <code>yum search python</code> so downloaded the python3 .tgz and extracted it to <code>/usr</code>. I ran the install scripts and the interpreter works. Then I installed scipy, numpy, ipython with <code>yum</code>. I start the python3 interpreter again, yet it appears it cannot find the scipy and numpy libraries. For example, <code>import numpy</code> will err in the interpreter. </p>
  
  <p>What must be done to make python3 to find these libraries?</p>