code: def most_frequent(lst):
      
      lst = lst[:]
      highest_freq = 0
      most_freq = None
  
      for val in unique(lst):
          if lst.count(val) > highest_freq:
              most_freq = val
              highest_freq = lst.count(val)
              
      return most_freq
docs: Returns the item that appears most frequently in the given list.