title: combine dataframes in pandas with repeat slices of one of them
body: <p>I want to combine 2 dataframes.</p>
  
  <p>Here are the samples of dataframes:</p>
  
  <p>df1:</p>
  
  <p><a href="https://1drv.ms/u/s!Aj5DfuTWg1OMjfUvzT9DN5XQQ5WW3A?e=vgDJid" rel="nofollow noreferrer">linktoDF1</a></p>
  
  <p><a href="https://i.stack.imgur.com/19KDw.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/19KDw.png" alt="enter image description here"></a></p>
  
  <p>df2:</p>
  
  <p><a href="https://1drv.ms/u/s!Aj5DfuTWg1OMjfUw7qnFKj7Eel6siA?e=y8f3Fv" rel="nofollow noreferrer">linkdoDF2</a></p>
  
  <p><a href="https://i.stack.imgur.com/X5D3s.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/X5D3s.png" alt="enter image description here"></a></p>
  
  <p>Desired output should be:</p>
  
  <p><a href="https://1drv.ms/u/s!Aj5DfuTWg1OMjfUxq0tkSvUJ2A-k5w?e=qKyR1P" rel="nofollow noreferrer">linktoResultcsv</a></p>
  
  <p><a href="https://i.stack.imgur.com/zLHId.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/zLHId.png" alt="enter image description here"></a></p>
  
  <p>What I want in essence is to extend df1 with data from df2. Key to linking data is index of both dataframes which is <code>['latitude','level','longitude']</code>. I want to omit data with index unique to df2. i.e. I don't want to see data with index <code>[41, 1000, 19.25 ]</code>
  Any help is appreciated.</p>