title: How to set the one value with where condition
body: <p>I have dataframe(df) like this </p>
  
  <pre><code>   key            name value
  0    0          master     0
  1    1           basic     0
  2    2           clear     0
  3    3            debu     0
  </code></pre>
  
  <p>What I want to do is like this below</p>
  
  <pre><code>items = [master,master,basic,clear]
  
  for i in items:   # loop the items
      df[where('name==@i')].value += 1     # increment each item
  </code></pre>
  
  <p>Final output should be </p>
  
  <pre><code>   key            name value
  0    0          master     2
  1    1           basic     1
  2    2           clear     1
  3    3            debu     0
  </code></pre>
  
  <p>How can I fetch the one value and increment ???</p>