title: Pretty printing a list of list of floats?
body: <p>Basically i have to dump a series of temperature readings, into a text file. This is a space delimited list of elements, where each row represents something (i don't know, and it just gets forced into a fortran model, <em>shudder</em>). I am more or less handling it from our groups side, which is extracting those temperature readings and dumping them into a text file. </p>
  
  <p>Basically a quick example is i have a list like this(but with alot more elements):</p>
  
  <pre><code>temperature_readings = [ [1.343, 348.222, 484844.3333], [12349.000002, -2.43333]]
  </code></pre>
  
  <p>In the past we just dumped this into a file, unfortunately there is some people who have this irritating knack of wanting to look directly at the text file, and picking out certain columns and changing some things (for testing.. i don't really know..). But they always complain about the columns not lining up properly, they pretty much the above list to be printed like this:</p>
  
  <pre><code>    1.343     348.222     484844.333
  12349.000002   -2.433333
  </code></pre>
  
  <p>So those wonderful decimals line up. Is there an easy way to do this?</p>