return the two biggest numbers in a list of dictionaries

def returnTwoBiggest(listOfDictionaries):
  #first we must sort the list
  listOfDictionaries.sort(key=lambda x: x['number'])
  #then we return the last two elements
  return listOfDictionaries[-1], listOfDictionaries[-2]
  
returnTwoBiggest([{number: 1}, {number: 2}, {number: 3}])