title: creating a list of values from entry widget tkinter
body: <p>I want to create a table in <strong>Python GUI</strong>, using entry widgets and obtain the values entered by the user for further calculation in a list.found the snippet below:</p>
  
  <p><a href="https://i.stack.imgur.com/91Tmz.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/91Tmz.png" alt="enter image description here"></a></p>
  
  <p>Is this the correct way?  </p>