当返回位于if语句中时，如何为函数提供返回值

def my_function():
    if condition:
        return value
    else:
        return another_value

def my_function():
    result = None
    if condition:
        result = value
    else:
        result = another_value
    return result

result = None

def my_function():
    global result
    if condition:
        result = value
    else:
        result = another_value
    return result