如何将字符串变量从一个函数传递到另一个函数？

def function1():
    my_string = "Hello, World!"
    function2(my_string)

def function2(input_string):
    print(input_string)

function1()  # 输出: Hello, World!

my_string = ""

def function1():
    global my_string
    my_string = "Hello, World!"

def function2():
    print(my_string)

function1()
function2()  # 输出: Hello, World!

def function1():
    my_string = "Hello, World!"
    return my_string

def function2(input_string):
    print(input_string)

result = function1()
function2(result)  # 输出: Hello, World!

class MyClass:
    def __init__(self, my_string):
        self.my_string = my_string

    def function1(self):
        return self.my_string

    def function2(self, input_string):
        print(input_string)

obj = MyClass("Hello, World!")
result = obj.function1()
obj.function2(result)  # 输出: Hello, World!