如何访问在Python中的函数之后定义的变量？

def my_function():
    global my_variable
    my_variable = 10

my_function()
print(my_variable)  # 输出：10

def my_function():
    my_variable = 10
    return my_variable

result = my_function()
print(result)  # 输出：10

def my_function():
    my_variable = 10
    return my_variable

def another_function(value):
    print(value)

result = my_function()
another_function(result)  # 输出：10