title: Bar chart with label name and value on top in pandas
body: <p>I have two columns where i used groupby option create a df called output_duration_per_device such as</p>
  
  <pre><code>output_duration_per_device=s3_dataset.groupby('DeviceType')['Output_media_duration'].sum().reset_index(name ='format_duration')
  
  output_duration_per_device
  DeviceType           format_duration
  0   Alchemist          8.166905e+06
  1   CaptionMaker       1.310864e+07
  2   Elemental          1.818089e+07
  3   EncodingCloud      0.000000e+00
  4   FfMpeg             5.258470e+07
  5   FlipFactory        4.747456e+02
  6   Rhozet             6.263442e+08
  7   Tachyon            4.827463e+06
  </code></pre>
  
  <p>I can make a bar chat and find like this</p>
  
  <pre><code>output_duration_per_device=s3_dataset.groupby('DeviceType')['Output_media_duration'].sum().reset_index(name ='Device_duration').plot(kind ='bar', figsize=(10,7), fontsize=13)
  output_duration_per_device.set_alpha(0.8)
  output_duration_per_device.set_title('DeviceType Output Media duration')
  output_duration_per_device.set_xlabel('DeviceType')
  plt.ylabel('Output_media_duration')
  </code></pre>
  
  <p>which gives me 
  <a href="https://i.stack.imgur.com/5BhGV.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/5BhGV.png" alt="enter image description here"></a></p>
  
  <p>but i want like below
  <a href="https://i.stack.imgur.com/RxsUW.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/RxsUW.png" alt="enter image description here"></a></p>
  
  <p>please help me </p>