发生break语句时生成器被破坏

Question

我想知道Obj.del（）方法 会被叫来的。在

def my_integers():
    Obj = ExitObj()
    i = 0
    while(1):
        yield i
        i += 1
def test_fun():
    for i in my_integers():
        if i > 3:
            break 
anything_function()
test_fun()

我做了一个测试，Obj似乎在break语句之后被删除：在anything\u function（）退出循环之前。在

当循环留给生成器中定义的对象的方法时，我可以依赖于此并给出一些我想完成的任务吗？在

Answer 1

下面是Python语言引用对^{}的描述

x.__del__() — ... is only called when x‘s reference count reaches zero. Some common situations that may prevent the reference count of an object from going to zero include: circular references between objects; a reference to the object on the stack frame of a function that caught an exception ...

因此，您不应该依赖__del__进行清理。上下文管理器（作为catplusmentions above）是正确的选择。在