如何在Python中同时访问另一个函数的变量？

def function1():
    variable = "Hello"
    function2(variable)

def function2(arg):
    print(arg + " World")

function1()

def function1():
    global variable
    variable = "Hello"
    function2()

def function2():
    print(variable + " World")

function1()

def function1():
    variable = "Hello"
    return variable

def function2():
    arg = function1()
    print(arg + " World")

function2()