Question

我正在使用aiohttp来创建一个小的webapp。我有这个方法：

import logging as log

class Streamer(object):
[...]
    def _update(self, id):  # @ReservedAssignment
        loop = self.loop
        analysis_streamer = self.analysis_streamer

        analysis_streamer.runAnalyses(id, loop=loop)
        print("Analyses done")

和AnalysisStreamer有以下方法：

class AnalysisStreamer(object):
[...]
    def runAnalyses(self, id, loop=None):
        analyses = self.queue.get(id, ())

        for analysis in analyses:
            self.runAnalysis(analysis, loop=loop)


    def runAnalysis(self, analysis, loop=None):
        log.debug("Executing {a}".format(a=analysis))
        analysis.run(loop=loop)

和Analysis有这种方法：

class Analysis(object):
    [...]

    def run(self, loop=None):
        """
        Run the analysis in a separate thread from asyncio loop

        @author Marco Sulla (marcosullaroma@gmail.com)
        @date Apr 28, 2016
        @param loop: asyncio loop to use to launch the thread. If none is 
                     provided, the default loop is used
        """

        @asyncio.coroutine
        def runInThread(self):
            # code here


        if loop is not None:
            loop.call_soon_threadsafe(
                asyncio.async,
                runInThread(self)
            )
        else:
            asyncio.async(runInThread(self))

它没有问题。我尝试在协程中转换runAnalyses()方法，只需执行

    yield from analysis_streamer.runAnalyses(id, loop=loop)

但这样代码就不再起作用了。 <{1}}将在此时暂停，_update()永远不会打印。

PS：我正在使用python 3.4.3

Coroutine永远等待着

0 个答案: