new_contents: def multiply(a, b):
    return a * b
  
  
  multiply = lambda x, y: x * y
  # multiply(1,5)
  # 很奇妙的用法
  
  multiply = __import__('operator').mul
  
  
  
  multiply = int.__mul__
  
  
  import operator
  multiply = operator.mul
  # multiply(1,5)
  
subject: Multiply 1st note