title: New to python - trying to chose individual columns from transposed matrix
body: <p>So presently code is as so:</p>
  
  <pre><code>table = []
  for line in open("harrytest.csv") as f:
     data = line.split(",")
     table.append(data)
  transposed = [[table[j][i] for j in range(len(table))] for i in range(len(table[0]))]
  openings = transposed[1][1: - 1]
  openings = [float(i) for i in openings]
  
  mean = sum(openings)/len(openings)
  print mean
  
  minimum = min(openings)
  print minimum
  
  maximum = max(openings)
  print maximum
  
  range1 = maximum - minimum
  print range1
  </code></pre>
  
  <ul>
  <li>This only prints one column of 7 for me, it also leaves out the bottom line. We are not allowed to import with csv module, use numpy, pandas. The only module allowed is os, sys, math &amp; datetime. </li>
  <li>How do I write the code so as to get median, first, last values for any column.</li>
  </ul>