title: update data frame with another data frame only if the column contains specific value
body: <p>I have two data frames df1, df2. </p>
  
  <p>I want to update the df1 with value "yes" in the same row number and column number as it is in the df2, </p>
  
  <p>I have attached the image for your reference. </p>
  
  <p>I am using python and pandas.</p>
  
  <p>Thanks<a href="https://i.stack.imgur.com/JdDm1.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/JdDm1.png" alt="enter image description here"></a></p>