title: Filter rows based on the count of unique values
body: <p>I need to count the unique values of column A and filter out the column with values greater than say 2</p>
  
  <pre><code> A C
  Apple 4
  Orange 5
  Apple 3
  Mango 5
  Orange 1
  </code></pre>
  
  <p>I have calculated the unique values but not able to figure out how to filer them <code>df.value_count()</code></p>
  
  <p>I want to filter column A that have greater than 2, expected Dataframe</p>
  
  <pre><code>A B
  Apple 4
  Orange 5
  Apple 3
  Orange 1
  </code></pre>