如何将python事件变量传递给另一个函数？

def function1(event):
    # 处理事件变量
    pass

def function2():
    event = "事件变量"
    function1(event)

function2()

event = "事件变量"

def function1():
    # 使用全局变量event
    pass

def function2():
    # 使用全局变量event
    pass

function1()
function2()

class MyClass:
    def __init__(self):
        self.event = "事件变量"

    def function1(self):
        # 使用self.event
        pass

    def function2(self):
        # 使用self.event
        pass

obj = MyClass()
obj.function1()
obj.function2()

def function1():
    event = "事件变量"
    return event

def function2(event):
    # 处理事件变量
    pass

event = function1()
function2(event)