input: Write a function in Python to remove duplicate entries from a 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, 6, 6, 7, 8, 8]) == [5, 6, 7, 8]
  assert removeDuplicates([]) == []
  assert removeDuplicates([10, 20, 30, 40, 30, 20, 10]) == [10, 20, 30, 40]
  assert removeDuplicates([1, 1, 1, 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