title: Unit Conversion in Python
body: <p>I'm working on a project that lets users track different data types over time. Part of the base idea is that a user should be able to enter data using any units that they need to. I've been looking at both units:</p>
  
  <p><a href="http://pypi.python.org/pypi/units/" rel="noreferrer">http://pypi.python.org/pypi/units/</a></p>
  
  <p>and quantities:</p>
  
  <p><a href="http://pypi.python.org/pypi/quantities/" rel="noreferrer">http://pypi.python.org/pypi/quantities/</a></p>
  
  <p>However I'm not sure the best way to go. From what I can tell, quantities is more complex, but includes a better initial list of units.</p>