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PyCharm Professional 调试器在使用 Google App Engine 时存在一个问题。调试由我的代码手动启动的线程时，断点不起作用。这会影响调试在which uses或2.7 backport
上运行的代码的能力（GAE 现在正式支持）dev_appserverthreading.Threadconcurrent.futures.ThreadPoolExecutor

PyCharm 2017.2 和 2017.3.4 均出现此问题。在 Ubuntu Linux 上的 GAE SDK 1.9.66 上观察到。

这是一个重现代码 - 从任何请求处理程序调用它。

from concurrent.futures import ThreadPoolExecutor, wait
from threading import Thread
def worker():
    logging.info("Worker")  # set breakpoint here
    time.sleep(3)

def call_this():  # call this from your request handler
    tpe = ThreadPoolExecutor(max_workers=5)
    futures = [tpe.submit(worker) for i in range(10)]
    wait(futures)
    threads = [Thread(worker) for i in range(10)]
    for t in threads: t.start()
    for t in threads: t.join()
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1 回答 1

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快速修复是修补patch_threads功能并为单独<pycharm-folder>/helpers/pydev/pydevd.py的978GAE 模块添加 settrace：

 def patch_threads(self):
    try:
        # not available in jython!
        import threading
        threading.settrace(self.trace_dispatch)  # for all future threads
        from google.appengine.dist27 import threading as gae_threading
        gae_threading.settrace(self.trace_dispatch)  # for all future threads
    except Exception as e:
        pass

    from _pydev_bundle.pydev_monkey import patch_thread_modules
    patch_thread_modules()
于 2018-03-19T17:04:26.343 回答