input: Write a function to remove duplicates from a given list.
  
  def removeDuplicates(input): 
      final_list = [] 
      for num in input: 
          if num not in final_list: 
              final_list.append(num) 
      return final_list 
  
  assert removeDuplicates([1,2,2,3,3,4]) == [1, 2, 3, 4]
  assert removeDuplicates([5,5,5,5,5]) == [5]
  assert removeDuplicates([]) == []
  assert removeDuplicates([1,2,3,4,5]) == [1, 2, 3, 4, 5]
  assert removeDuplicates([1]) == [1]
output: def removeDuplicates(input): 
      final_list = [] 
      for num in input: 
          if num not in final_list: 
              final_list.append(num) 
      return final_list