Build a self modifying program who modifying itself by help of internet data or it works on my instruction

def add(a, b):
      return a + b
 
    def subtract(a, b):
      return a - b
 
    def multiply(a, b):
      return a * b
 
    def divide(a, b):
      return a / b
 
    print("Select operation.")
    print("1.Add")
    print("2.Subtract")
    print("3.Multiply")
    print("4.Divide")
 
    while True:
      choice = input("Enter choice(1/2/3/4): ")
 
      if choice in ('1', '2', '3', '4'):
        num1 = float(input("Enter first number: "))
        num2 = float(input("Enter second number: "))
 
        if choice == '1':
          print(num1, "+", num2, "=", add(num1, num2))
 
        elif choice == '2':
          print(num1, "-", num2, "=", subtract(num