title: [Pandas]: Combining rows of Dataframe based on same column values
body: <p>I have a dataframe like the one below - </p>
  
  <p><a href="https://i.stack.imgur.com/tg8kU.png" rel="noreferrer"><img src="https://i.stack.imgur.com/tg8kU.png" alt="enter image description here"></a></p>
  
  <p>How can I combine the rows such that all the neighbourhoods belonging to the same Postcode are displayed in the same row seperated by commas. Something like this - </p>
  
  <p>| Postcode | Borough | Neighbourhood |</p>
  
  <p>| M1B | Scarborough | Rouge, Malvern |</p>
  
  <p>| M5A | Downtown Toronto | Harbourfront, Regent Park |</p>
  
  <p>| M6A | North York | Lawrence Heights, Lawrence Manor |</p>
  
  <p>and the rest of the rows as they are...</p>