title: Appending a value from a Column to another Column based on a condition
body: <p>This is the type of my data:</p>
  <p><a href="https://i.stack.imgur.com/Dv53v.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Dv53v.png" alt="enter image description here" /></a></p>
  <p>I wish to write a Python script that can help me do the following:</p>
  <p>If ABC company bought chocolate and tea, then I want to both of the products they bought, and append it into another column like the following output:</p>
  <p><a href="https://i.stack.imgur.com/nALWQ.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/nALWQ.png" alt="enter image description here" /></a></p>
  <p>I have been trying to do it using Pandas but can't iterate through the columns/rows like I would want to.
  Any and All ideas would be appreciated. Thanks in advance!</p>