Event Loop Debugging?

[Sylphe88]

Platform/OS/Device Windows 10, Python 3.7.5, Pycharm 2020.3.4, pydev debugger (build 203.7717.65)

Describe the question I'm aware this may not really be a 100% awsiot question, but this got me stuck for a quite a while now. I'm evaluating whether it's a good time to migrate from AWSIoTPythonSDK to awsiotsdk and so far it's working pretty good, but I've been completely unable to debug my code running in callbacks (using breakpoints and step-by-step). This applies to the pubsub sample (can't step into the on_message_received callback). I guess it's related to the event loops created by C code, which make it more difficult to attach to pydevd? However, I have mostly been successful at debugging threads in my Python apps, so there migh be a catch with this?

Thanks a lot for the help & advice!

[jmklix]

Have you tried using debugpy? Just pip install debugpy and add the following to your project:

import debugpy
debugpy.debug_this_thread()

*I tried this is vscode so let me know if this doesn't work in pydev

[Sylphe88]

I managed to use it in VSCode, but it looks like debugpy interfers with the native pydev from Pycharm, resulting in ImportError: cannot import name 'pydevd_defaults' from '_pydevd_bundle' (C:\Program Files\JetBrains\PyCharm Community Edition 2020.3.4\plugins\python-ce\helpers\pydev\_pydevd_bundle\__init__.py)

So "as expected" it looks like the issue may be with their debugger. Thanks for the tip!

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