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Multi Istance problem

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I run this script:

import cpuinfo  # pip install py-cpuinfo


happens that a new instance of the program runs and a JSON error appears when new istance closed :

Traceback (most recent call last):
  File "<string>", line 3, in <module>
  File "..............\Python311\Lib\site-packages\cpuinfo\cpuinfo.py", line 2762, in get_cpu_info
    output = json.loads(output, object_hook = _utf_to_str)
  File "..............\Python311\Lib\json\__init__.py", line 359, in loads
    return cls(**kw).decode(s)
  File "..............\Python311\Lib\json\decoder.py", line 337, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "..............\Python311\Lib\json\decoder.py", line 355, in raw_decode
    raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)


This doesn't happen when running the script from python

The problem is in this line of cpuinfo.py that create a new istance


        p1 = Popen(command, stdout=PIPE, stderr=PIPE, stdin=PIPE)


I don't need to use the cpuinfo library but it's used in the ultralytics libraries to determine if a GPU is present.


You can experience the same effect with this simple script

from ultralytics import YOLO

model = YOLO("yolov8n.pt")

results = model.predict(source="\\temp", show=True)


For now I have modified the get_cpu_info() function found in the torch_utils.py of ultralytics library, but it's not a good thing 😞

Does anyone have any ideas on how to avoid this problem?



Edited by canaglia

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I think this has to do with the default encoding of the pipe stdout.   Python uses utf8, however since the script is run from a Delphi program it may inherit the encoding from the parent process.  Just a guess.

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