title: Join Count to the original DataFrame in pandas
body: <p>Give Data Frame as</p>
  
  <pre><code>import pandas as pd 
  lst = ['Yes', 'No', 'Maybe', 'Yes', 'No', 'Maybe', 'Yes'] 
  lst2 = [11, 22, 33, 44, 55, 66, 77] 
  df = pd.DataFrame(list(zip(lst, lst2)), 
                 columns =['Name', 'val'])
  </code></pre>
  
  <p>I used to below to get GroupBy Count</p>
  
  <pre><code>countData=df.groupby("Name")["Name"].count()
  countData
  </code></pre>
  
  <blockquote>
    <p>Name </p>
    
    <p>Maybe    2</p>
    
    <p>No       2 </p>
    
    <p>Yes      3</p>
  </blockquote>
  
  <p>How to join the countData with DF ?</p>