input: 
  def remove_item(list_, item):
      """Remove all occurrences of the specified item from the list.
      >>> remove_item([1, 2, 3, 4, 2, 5, 2], 2)
      [1, 3, 4, 5]
      """
      return [x for x in list_ if x != item]
  
output:     return [x for x in list_ if x != item]