title: getting errors when trying to install matplotlib and numpy using pip
body: <p>I have python version 3.3. I did install pip and now trying to install matplotlib and numpy.</p>
  
  <pre><code>pip install matplotlib
  pip install numpy
  </code></pre>
  
  <p>I get these errors:</p>
  
  <pre><code>File "/Library/Frameworks/Python.framework/Versions/3.3/lib/python3.3/distutils/sysconfig.py", line 191, in customize_compiler
  
      _osx_support.customize_compiler(_config_vars)
  
    File "/Library/Frameworks/Python.framework/Versions/3.3/lib/python3.3/_osx_support.py", line 418, in customize_compiler
  
      _find_appropriate_compiler(_config_vars)
  
    File "/Library/Frameworks/Python.framework/Versions/3.3/lib/python3.3/_osx_support.py", line 191, in _find_appropriate_compiler
  
      "Cannot locate working compiler")
  
  SystemError: Cannot locate working compiler
  
  ----------------------------------------
  Cleaning up...
    Removing temporary dir /private/var/folders/fz/4bjb8_8x4rs_8r97vrh92_mh0000gn/T/pip_build_ayseburcuozdal...
  Command python setup.py egg_info failed with error code 1 in /private/var/folders/fz/4bjb8_8x4rs_8r97vrh92_mh0000gn/T/pip_build_ayseburcuozdal/numpy
  Exception information:
  Traceback (most recent call last):
    File "/Library/Frameworks/Python.framework/Versions/3.3/lib/python3.3/site-packages/pip-1.5-py3.3.egg/pip/basecommand.py", line 122, in main
      status = self.run(options, args)
    File "/Library/Frameworks/Python.framework/Versions/3.3/lib/python3.3/site-packages/pip-1.5-py3.3.egg/pip/commands/install.py", line 270, in run
      requirement_set.prepare_files(finder, force_root_egg_info=self.bundle, bundle=self.bundle)
    File "/Library/Frameworks/Python.framework/Versions/3.3/lib/python3.3/site-packages/pip-1.5-py3.3.egg/pip/req.py", line 1206, in prepare_files
      req_to_install.run_egg_info()
    File "/Library/Frameworks/Python.framework/Versions/3.3/lib/python3.3/site-packages/pip-1.5-py3.3.egg/pip/req.py", line 312, in run_egg_info
      command_desc='python setup.py egg_info')
    File "/Library/Frameworks/Python.framework/Versions/3.3/lib/python3.3/site-packages/pip-1.5-py3.3.egg/pip/util.py", line 696, in call_subprocess
      % (command_desc, proc.returncode, cwd))
  </code></pre>