title: How to convert entire table from text to int
body: <p>I have a txt file that I read with: </p>
  
  <pre><code>fdata =[]
  with open(fn,'rb') as fo:
       for i in xrange(1):
             fo.next()
       for line in fo:                       
             data = line.split(',')
             data = data[:23]
             fdata.append(data)    
       print fdata 
  </code></pre>
  
  <p>I would like convert the entire table to numbers from string. AND limit the table size to read to XXX lines. </p>