input: Write a function to optimize a given Python program by improving its readability and reducing unnecessary code. The input is a list of numbers, and the program needs to print each number on a new line. If the input is empty, the function should return an empty list.
  
  assert optimize_code([1, 2, 3, 4, 5, 6])=="""numbers = [1, 2, 3, 4, 5, 6]
  
  print(*numbers, sep='\\n')"""
  assert optimize_code([])=="""numbers = []
  
  print(*numbers, sep='\\n')"""
  assert optimize_code([7, 8, 9])=="""numbers = [7, 8, 9]
  
  print(*numbers, sep='\\n')"""
output: def optimize_code(numbers):
      return f"""numbers = {numbers}
  
  print(*numbers, sep='\\n')"""