old_contents: thisdict = {
    "name": "avsingh",
    "course": "B.Tech",
    "year": 2020
  }
  print(thisdict)
  
  print(thisdict["name"])
  
  print(thisdict.get("name"))
  
new_contents: thisdict = {
    "name": "avsingh",
    "course": "B.Tech",
    "year": 2020
  }
  print(thisdict)
  
  print(thisdict["name"])
  
  print(thisdict.get("name"))
  
  thisdict["color"] = "red"
  
  print(thisdict)
  
subject: update new one