After installing packages with python and running a torch training script, I encountered the following error.

ValueError: numpy.ndarray size changed, may indicate binary incompatibility. Expected 88 from C header, got 80 from PyObject

This error occurred in pycocotools package which was used by detectron2 package.

My solution was to reinstall pycocotools package with special options.

$ pip uninstall pycocotools
$ pip install pycocotools --no-binary :all: --no-build-isolation

after this fix, the above error did not appear. My environment was CentOS7, python3.9.5, x64 machine.


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