how can i call python3 function in groutine #3

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1. xxz199539

   changed the title [-]how can call python3 function in groutine[/-] [+]how can i call python3 function in groutine[/+] on Dec 27, 2021
2. MarSoft commented on Dec 27, 2021

   

   MarSoft

   on Dec 27, 2021

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   Try the following:

   1. Lock your goroutine to the thread: runtime.LockOSThread(); defer runtime.UnlockOSThread() - to avoid it jumping between threads while python code is called
   2. Make sure you acquire GIL in the coroutine's thread: gilstate := py.PyGILState_Ensure(); defer py.PyGILState_Release(gilstate) - so that GIL is acquired while you call Python code
   3. Now you should be safe to call Python code.

   I cannot tell more without seeing your code. A minimal reproducing example would be ideal.

   👍React with 👍2Reacted by Christian Korneck and 伊邪那岐
3. xxz199539

   closed this as completedon Dec 27, 2021
4. christian-korneck commented on Dec 27, 2021

   

   christian-korneck

   on Dec 27, 2021

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   Quoting from a previous issue:

   This project is just a relatively thin wrapper around Python's C API. So basically all the limitations of the Python C API apply. One limitation is that Python has a global interpreter lock (GIL). You can't do multiple things in a Python interpreter at the same time (unless you use Python's concurrency features in the Python code that you're executing).

   The easiest way to make embedded Python to work with goroutines is to make sure that only one goroutine is actually "doing" Python at a time and all the other ones have to wait. Here's an excellent blog post and related conference talk that cover this and a few other options.