Occasional infinite while loop in MATLAB engine package for Python when waiting for results

Mauro Belgiovine

2021 10 7

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8 次查看（30 天）

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I am using Python 3.7 and compiled the Matlab engine package from Matlab 2020a on an Ubuntu 18.04 OS. I use Matlab package to run some Matlab functions within my Python program, usually everything works fine but sometimes my program gets stuck into an infinite loop waiting for a function to return the values from Matlab engine. Specifically, the program is stuck in the "wait()" function from "BaseFuture" class.

What is the reason for Matlab engine randomly stopping/hanging? Is there a way to solve this random behavior?

UPDATE: I have tried recompiling the package with Matlab 2021b, but I am observing the same behavior...

Following is an excerpt of the Python code from Matlab engine package that results in the infinite waiting loop:

    def wait(self, timeout, wait_for_func):
        ...
        time_slice = 1
        if timeout is None:
            result_ready = self.done()
            while not result_ready:
                result_ready = wait_for_func(self._future, time_slice)
        ...