title: How to concatenate multiple columns in Excel using Python program
body: <p>I want to concatenate multiple columns of Excel into single column using Python. Please find below the format:</p>
  <p><a href="https://i.stack.imgur.com/GjNlB.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/GjNlB.png" alt="enter image description here" /></a></p>
  <p>and after concatenate it will make single column:</p>
  <p><a href="https://i.stack.imgur.com/BdJt4.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/BdJt4.png" alt="enter image description here" /></a></p>
  <p>How can I do this?</p>