title: Python: Loading .txt files into different lists
body: <p>Please excuse my silly question as I am really new to python.</p>
  
  <p>I have 20 different .txt files (eg <code>"myfile_%s"</code> with <code>s</code> having been attributed to an integer in range=1,21). So I load them as follows:</p>
  
  <pre><code>runs=range(1,21)
  
  for i in runs:
  
       Myfile=np.loadtxt("myfile_%s.txt" %i, delimiter=',', unpack=True)
  </code></pre>
  
  <p>Hence, they're being loaded into a variable of "float64" type.
  I would like to load them into 20 different lists (so as to find the maximum value of each etc.).</p>
  
  <p>Thank you in advance!</p>
  
  <p>PS: I would be happy to hear any textbook recommendations for python beginners.</p>