input: 
  def removeDuplicates(input): 
      final_list = [] 
      for num in input: 
          if num not in final_list: 
              final_list.append(num) 
      return final_list 
  
  """
  Remove duplicate entries from a list.
  >>> removeDuplicates([1, 2, 2, 3, 3, 4])
  [1, 2, 3, 4]
  """
  
output:     return final_list