twisted循环调用访问类变量

Question

我有一个这样的例子

class Intake:
    def __init__(self):

        #
        # aggregate dict to store all the counters
        #
        self.counters = {}

        #
        # start a looping call to run reach minute
        #
        self.lc = task.LoopingCall(self.aggregate, self.counters)
        self.lc.start(60)


    def aggregate(self, counters):
        print counters

这个运行得很好……但是在我的聚合函数里，我需要清空 self.counters 这个字典。我在这方面遇到了一些问题……

我想做类似这样的事情

    def aggregate(self, counters):
        print counters

        self.counters = {}

如果我在那个函数里引用 self.counters，我会得到

exceptions.AttributeError: Intake instance has no attribute 'counters'

Answer 1

如果你能提供一个可以运行的例子来说明你的问题，那会是个好主意。因为我试了你描述的内容，结果是没问题的。

from twisted.internet import task

class Intake:
    def __init__(self):

        #
        # aggregate dict to store all the counters
        #
        self.counters = {}
        self.count = 0
        #
        # start a looping call to run reach minute
        #
        self.lc = task.LoopingCall(self.aggregate, self.counters)
        self.lc.start(1)


    def aggregate(self, counters):
        print '%d, %r, %r' % (self.count, counters, self.counters)
        self.count += 1
        self.counters = {}

if __name__ == "__main__":
    from twisted.internet import reactor
    r = Intake()
    reactor.run()