title: Join txt files side by side in python
body: <p>I have 2 arrays of data in txt files:</p>
  
  <blockquote>
    <p>A1 A2 A3<br>
    A4 A5 A6<br>
    A7 A8 A9</p>
  </blockquote>
  
  <p>and</p>
  
  <blockquote>
    <p>B1 B2 B3<br>
    B4 B5 B6<br>
    B7 B8 B9</p>
  </blockquote>
  
  <p>I would like to combine them side by side:</p>
  
  <blockquote>
    <p>A1 A2 A3 B1 B2 B3<br>
    A4 A5 A6 B4 B5 B6<br>
    A7 A8 A9 B7 B8 B9  </p>
  </blockquote>
  
  <p>(The spaces are actually tabs in my txt files)</p>
  
  <p>Thank you!</p>