title: numpy.loadtxt and tab separated values: data type not understood
body: <p>I'm having problems importing tab separated values using <code>numpy.loadtxt</code>.</p>
  
  <p>The rows I need to import have the following form:</p>
  
  <pre><code>01-Aug-2013 1143_051-100    r   702 135 32  7   
  </code></pre>
  
  <p>I only want to read columns 0,2,3,4,5,6. This is what I have so far:</p>
  
  <pre><code>numpy.loadtxt(test,dtype= (str,str,int,int,int,int), delimiter= "\t", usecols = (0,2,3,4,5,6))
  </code></pre>
  
  <p>This returns <code>data type not understood</code>. What am I missing here?</p>