title: How to fix paths to solve Homebrew doctor warnings
body: <p>Another newbie query. I've been struggling to install matplotlib for a Python project so reading around suggested Homebrew was a solid solution for package management and dependencies.</p>
  
  <p>However when I run the Homebrew diagnostics I receive the following error:</p>
  
  <pre><code>$ brew doctor
  Warning: "config" scripts exist outside your system or Homebrew directories.
  `./configure` scripts often look for *-config scripts to determine if
  software packages are installed, and what additional flags to use when
  compiling and linking.
  
  Having additional scripts in your path can confuse software installed via
  Homebrew if the config script overrides a system or Homebrew provided
  script of the same name. We found the following "config" scripts:
  
  /Library/Frameworks/Python.framework/Versions/2.7/bin/python-config
  /Library/Frameworks/Python.framework/Versions/2.7/bin/python2-config
  /Library/Frameworks/Python.framework/Versions/2.7/bin/python2.7-config
  Warning: /usr/bin occurs before /usr/local/bin
  This means that system-provided programs will be used instead of those
  provided by Homebrew. The following tools exist at both paths:
  
  2to3
  2to3-2.7
  idle
  idle2.7
  pydoc
  pydoc2.7
  python
  python-config
  python2.7
  python2.7-config
  pythonw
  pythonw2.7
  smtpd.py
  smtpd2.7.py
  tclsh
  tclsh8.5
  wish
  wish8.5
  
  Consider amending your PATH so that /usr/local/bin
  occurs before /usr/bin in your PATH.
  </code></pre>
  
  <p>I know this is an incredibly simple query but how do I fix the path?</p>
  
  <p>More importantly, is Homebrew the current package of choice? I've seen so many articles surrounding Fink and MacPorts, easy_install and pip that I can't work out what the best practice is.</p>