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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"undefined symbol: Py_SET_TYPE","articleBody":"After installing slycot using pip I got the following error, when I am trying to import it: \r\n```shell\r\nPython 3.8.10 (default, Nov 14 2022, 12:59:47) \r\n[GCC 9.4.0] on linux\r\nType \"help\", \"copyright\", \"credits\" or \"license\" for more information.\r\n\u003e\u003e\u003e import slycot\r\nTraceback (most recent call last):\r\n  File \"\u003cstdin\u003e\", line 1, in \u003cmodule\u003e\r\n  File \"/home/user/env/lib/python3.8/site-packages/slycot/__init__.py\", line 16, in \u003cmodule\u003e\r\n    from .analysis import ab01nd, ab05md, ab05nd, ab07nd, ab08nd, ab08nz\r\n  File \"/home/user/env/lib/python3.8/site-packages/slycot/analysis.py\", line 22, in \u003cmodule\u003e\r\n    from . import _wrapper\r\nImportError: /home/user/env/lib/python3.8/site-packages/slycot/_wrapper.cpython-38-x86_64-linux-gnu.so: undefined symbol: Py_SET_TYPE\r\n```\r\n\r\nI am using Ubuntu 20.04 with Python 3.8.10 and created a new virtual environment for it: \r\n```shell\r\n$ virtualenv env \r\n$ source ./env/bin/activate\r\n$ pip install --no-cache-dir slycot\r\nCollecting slycot\r\n  Downloading slycot-0.5.3.tar.gz (3.0 MB)\r\n     |████████████████████████████████| 3.0 MB 6.3 MB/s \r\n  Installing build dependencies ... done\r\n  Getting requirements to build wheel ... done\r\n    Preparing wheel metadata ... done\r\nCollecting numpy\r\n  Downloading numpy-1.24.2-cp38-cp38-manylinux_2_17_x86_64.manylinux2014_x86_64.whl (17.3 MB)\r\n     |████████████████████████████████| 17.3 MB 100.9 MB/s \r\nBuilding wheels for collected packages: slycot\r\n  Building wheel for slycot (PEP 517) ... done\r\n  Created wheel for slycot: filename=slycot-0.5.3-cp38-cp38-linux_x86_64.whl size=1987476 sha256=53f161973476b615f3a07211877910eb89ad85d66428fc31d8b6e980a21a766a\r\n  Stored in directory: /tmp/pip-ephem-wheel-cache-e2j324rb/wheels/f7/b1/ef/08bc53cdb0fe98fa3c4067f1e674ebc4fd32a965544b558450\r\nSuccessfully built slycot\r\nInstalling collected packages: numpy, slycot\r\nSuccessfully installed numpy-1.24.2 slycot-0.5.3\r\n$ python -c 'import slycot'\r\nTraceback (most recent call last):\r\n  File \"\u003cstdin\u003e\", line 1, in \u003cmodule\u003e\r\n  File \"/home/user/env/lib/python3.8/site-packages/slycot/__init__.py\", line 16, in \u003cmodule\u003e\r\n    from .analysis import ab01nd, ab05md, ab05nd, ab07nd, ab08nd, ab08nz\r\n  File \"/home/user/env/lib/python3.8/site-packages/slycot/analysis.py\", line 22, in \u003cmodule\u003e\r\n    from . import _wrapper\r\nImportError: /home/user/env/lib/python3.8/site-packages/slycot/_wrapper.cpython-38-x86_64-linux-gnu.so: undefined symbol: Py_SET_TYPE\r\n```","author":{"url":"https://github.com/grisuthedragon","@type":"Person","name":"grisuthedragon"},"datePublished":"2023-02-28T11:41:28.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":6},"url":"https://github.com/193/Slycot/issues/193"}