input: from typing import List
  
  
  def reversed_string(string: str) -> str:
      """
      Optimizes a given Python script that reverses a string by using string slicing.
  
      >>> reversed_string("hello")
      'olleh'
      >>> reversed_string("Python")
      'nohtyP'
      >>> reversed_string("")
      ''
      """
      return string[::-1]
output:     return string[::-1]