René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Windows setup via conda-forge not working ImportError: DLL load failed while importing _wrapper","articleBody":"Hi everybody\r\n\r\nI would like to test and evaluate the package to eventually leave Matlab behind for my control systems class. Currently I'm using Windows 10. To make the error reproducible i created a fresh and clean local user and installed miniconda3 and vscode only.\r\n\r\nThe exact commands in miniconda3 were:\r\n```\r\nconda update -n base -c defaults conda\r\nconda create --name pichim\r\nconda activate pichim\r\nconda install -c conda-forge control slycot numpy scipy matplotlib ipykernel\r\n```\r\n \r\nI then run vscode with the python and jupyter extensions (packs) with the conda enviroment ``pichim``. The example ``phaseplots.py`` is working fine, others using more sophisticated tooling from python-control including ``slycot`` do not. E.g. ``cruise.ipynb`` is working fine, whereas ``robustsiso.py`` do not.\r\n\r\nI get the error:\r\n``` \r\n---------------------------------------------------------------------------\r\nImportError                               Traceback (most recent call last)\r\nFile [c:\\Users\\pichim\\miniconda3\\envs\\pichim\\lib\\site-packages\\control\\statesp.py:1547](file:///C:/Users/pichim/miniconda3/envs/pichim/lib/site-packages/control/statesp.py:1547), in _convert_to_statespace(sys, use_prefix_suffix)\r\n   1546 try:\r\n-\u003e 1547     from slycot import td04ad\r\n   1549     # Change the numerator and denominator arrays so that the transfer\r\n   1550     # function matrix has a common denominator.\r\n   1551     # matrices are also sized/padded to fit td04ad\r\n\r\nFile [c:\\Users\\pichim\\miniconda3\\envs\\pichim\\lib\\site-packages\\slycot\\__init__.py:16](file:///C:/Users/pichim/miniconda3/envs/pichim/lib/site-packages/slycot/__init__.py:16)\r\n     11 else:\r\n     12 \r\n     13     # import slycot.examples\r\n     14 \r\n     15     # Analysis routines (15/40 wrapped)\r\n---\u003e 16     from .analysis import ab01nd, ab05md, ab05nd, ab07nd, ab08nd, ab08nz\r\n     17     from .analysis import ab09ad, ab09ax, ab09bd, ab09md, ab09nd\r\n\r\nFile [c:\\Users\\pichim\\miniconda3\\envs\\pichim\\lib\\site-packages\\slycot\\analysis.py:22](file:///C:/Users/pichim/miniconda3/envs/pichim/lib/site-packages/slycot/analysis.py:22)\r\n     20 import numpy as np\r\n---\u003e 22 from . import _wrapper\r\n     23 from .exceptions import raise_if_slycot_error, SlycotParameterError\r\n\r\nImportError: DLL load failed while importing _wrapper: The specified module could not be found.\r\n...\r\n   1582     # the squeeze\r\n   1583     A, B, C, D = \\\r\n   1584         sp.signal.tf2ss(squeeze(sys.num), squeeze(sys.den))\r\n\r\nTypeError: No support for MIMO without slycot\r\nOutput is truncated. View as a [scrollable element](command:cellOutput.enableScrolling?e2d3b551-dd88-41f7-90f8-e6ba35d27e94) or open in a [text editor](command:workbench.action.openLargeOutput?e2d3b551-dd88-41f7-90f8-e6ba35d27e94). Adjust cell output [settings](command:workbench.action.openSettings?%5B%22%40tag%3AnotebookOutputLayout%22%5D)...\r\n``` \r\nListing the packages from the conda environment  with ``conda list -n pichim`` produces the following output:\r\n``` \r\n# packages in environment at C:\\Users\\pichim\\miniconda3\\envs\\pichim:\r\n#\r\n# Name                    Version                   Build  Channel\r\nasttokens                 2.4.0              pyhd8ed1ab_0    conda-forge\r\nbackcall                  0.2.0              pyh9f0ad1d_0    conda-forge\r\nbackports                 1.0                pyhd8ed1ab_3    conda-forge\r\nbackports.functools_lru_cache 1.6.5              pyhd8ed1ab_0    conda-forge\r\nbrotli                    1.1.0                hcfcfb64_1    conda-forge\r\nbrotli-bin                1.1.0                hcfcfb64_1    conda-forge\r\nca-certificates           2023.7.22            h56e8100_0    conda-forge\r\ncertifi                   2023.7.22          pyhd8ed1ab_0    conda-forge\r\nclang                     17.0.2               h3dc180e_0    conda-forge\r\nclang-17                  17.0.2          default_heb8d277_0    conda-forge\r\nclangxx                   17.0.2          default_heb8d277_0    conda-forge\r\ncolorama                  0.4.6              pyhd8ed1ab_0    conda-forge\r\ncomm                      0.1.4              pyhd8ed1ab_0    conda-forge\r\ncompiler-rt               17.0.2               h91493d7_1    conda-forge\r\ncompiler-rt_win-64        17.0.2               h91493d7_1    conda-forge\r\ncontourpy                 1.1.1            py39h1f6ef14_1    conda-forge\r\ncontrol                   0.9.4              pyhd8ed1ab_0    conda-forge\r\ncycler                    0.12.1             pyhd8ed1ab_0    conda-forge\r\ndebugpy                   1.8.0            py39h99910a6_1    conda-forge\r\ndecorator                 5.1.1              pyhd8ed1ab_0    conda-forge\r\nexceptiongroup            1.1.3              pyhd8ed1ab_0    conda-forge\r\nexecuting                 1.2.0              pyhd8ed1ab_0    conda-forge\r\nfonttools                 4.43.1           py39ha55989b_0    conda-forge\r\nfreetype                  2.12.1               hdaf720e_2    conda-forge\r\nicu                       68.2                 h0e60522_0    conda-forge\r\nimportlib-metadata        6.8.0              pyha770c72_0    conda-forge\r\nimportlib-resources       6.1.0              pyhd8ed1ab_0    conda-forge\r\nimportlib_metadata        6.8.0                hd8ed1ab_0    conda-forge\r\nimportlib_resources       6.1.0              pyhd8ed1ab_0    conda-forge\r\nintel-openmp              2023.2.0         h57928b3_50496    conda-forge\r\nipykernel                 6.25.2             pyh60829e3_0    conda-forge\r\nipython                   8.16.1             pyh5737063_0    conda-forge\r\njedi                      0.19.1             pyhd8ed1ab_0    conda-forge\r\njpeg                      9e                   hcfcfb64_3    conda-forge\r\njupyter_client            8.4.0              pyhd8ed1ab_0    conda-forge\r\njupyter_core              5.4.0            py39hcbf5309_0    conda-forge\r\nkiwisolver                1.4.5            py39h1f6ef14_1    conda-forge\r\nlerc                      3.0                  hd77b12b_0\r\nlibblas                   3.9.0              19_win64_mkl    conda-forge\r\nlibbrotlicommon           1.1.0                hcfcfb64_1    conda-forge\r\nlibbrotlidec              1.1.0                hcfcfb64_1    conda-forge\r\nlibbrotlienc              1.1.0                hcfcfb64_1    conda-forge\r\nlibcblas                  3.9.0              19_win64_mkl    conda-forge\r\nlibclang                  11.1.0          default_h5c34c98_1    conda-forge\r\nlibdeflate                1.17                 h2bbff1b_1\r\nlibflang                  17.0.2               h63175ca_0    conda-forge\r\nlibhwloc                  2.9.3           default_haede6df_1009    conda-forge\r\nlibiconv                  1.17                 h8ffe710_0    conda-forge\r\nliblapack                 3.9.0              19_win64_mkl    conda-forge\r\nlibpng                    1.6.39               h19919ed_0    conda-forge\r\nlibsodium                 1.0.18               h8d14728_1    conda-forge\r\nlibsqlite                 3.43.2               hcfcfb64_0    conda-forge\r\nlibtiff                   4.5.1                hd77b12b_0\r\nlibwebp                   1.3.2                hcfcfb64_1    conda-forge\r\nlibwebp-base              1.3.2                hcfcfb64_0    conda-forge\r\nlibxml2                   2.11.5               hc3477c8_1    conda-forge\r\nlibzlib                   1.2.13               hcfcfb64_5    conda-forge\r\nmatplotlib                3.8.0            py39hcbf5309_2    conda-forge\r\nmatplotlib-base           3.8.0            py39hf19769e_2    conda-forge\r\nmatplotlib-inline         0.1.6              pyhd8ed1ab_0    conda-forge\r\nmkl                       2023.2.0         h6a75c08_50496    conda-forge\r\nmunkres                   1.1.4              pyh9f0ad1d_0    conda-forge\r\nnest-asyncio              1.5.8              pyhd8ed1ab_0    conda-forge\r\nnumpy                     1.26.0           py39hddb5d58_0    conda-forge\r\nopenjpeg                  2.5.0                ha2aaf27_2    conda-forge\r\nopenssl                   1.1.1w               hcfcfb64_0    conda-forge\r\npackaging                 23.2               pyhd8ed1ab_0    conda-forge\r\nparso                     0.8.3              pyhd8ed1ab_0    conda-forge\r\npickleshare               0.7.5                   py_1003    conda-forge\r\npillow                    10.0.1           py39h045eedc_0\r\npip                       23.3               pyhd8ed1ab_0    conda-forge\r\nplatformdirs              3.11.0             pyhd8ed1ab_0    conda-forge\r\nprompt-toolkit            3.0.39             pyha770c72_0    conda-forge\r\nprompt_toolkit            3.0.39               hd8ed1ab_0    conda-forge\r\npsutil                    5.9.5            py39ha55989b_1    conda-forge\r\npthreads-win32            2.9.1                hfa6e2cd_3    conda-forge\r\npure_eval                 0.2.2              pyhd8ed1ab_0    conda-forge\r\npygments                  2.16.1             pyhd8ed1ab_0    conda-forge\r\npyparsing                 3.1.1              pyhd8ed1ab_0    conda-forge\r\npyqt                      5.12.3           py39hb0d2dfa_4    conda-forge\r\npyqt5-sip                 4.19.18                  pypi_0    pypi\r\npyqtchart                 5.12                     pypi_0    pypi\r\npyqtwebengine             5.12.1                   pypi_0    pypi\r\npython                    3.9.18               h6244533_0\r\npython-dateutil           2.8.2              pyhd8ed1ab_0    conda-forge\r\npython_abi                3.9                      2_cp39    conda-forge\r\npywin32                   306              py39h99910a6_2    conda-forge\r\npyzmq                     25.1.1           py39hea35a22_1    conda-forge\r\nqt                        5.12.9               h5909a2a_4    conda-forge\r\nscipy                     1.11.3           py39hddb5d58_1    conda-forge\r\nsetuptools                68.2.2             pyhd8ed1ab_0    conda-forge\r\nsix                       1.16.0             pyh6c4a22f_0    conda-forge\r\nslycot                    0.5.4            py39h73a3b6d_1    conda-forge\r\nsqlite                    3.43.2               hcfcfb64_0    conda-forge\r\nstack_data                0.6.2              pyhd8ed1ab_0    conda-forge\r\ntbb                       2021.10.0            h91493d7_1    conda-forge\r\ntk                        8.6.13               hcfcfb64_0    conda-forge\r\ntornado                   6.3.3            py39ha55989b_1    conda-forge\r\ntraitlets                 5.11.2             pyhd8ed1ab_0    conda-forge\r\ntyping-extensions         4.8.0                hd8ed1ab_0    conda-forge\r\ntyping_extensions         4.8.0              pyha770c72_0    conda-forge\r\ntzdata                    2023c                h71feb2d_0    conda-forge\r\nucrt                      10.0.22621.0         h57928b3_0    conda-forge\r\nunicodedata2              15.1.0           py39ha55989b_0    conda-forge\r\nvc                        14.3                h64f974e_17    conda-forge\r\nvc14_runtime              14.36.32532         hdcecf7f_17    conda-forge\r\nvs2015_runtime            14.36.32532         h05e6639_17    conda-forge\r\nwcwidth                   0.2.8              pyhd8ed1ab_0    conda-forge\r\nwheel                     0.41.2             pyhd8ed1ab_0    conda-forge\r\nxz                        5.4.2                h8cc25b3_0\r\nzeromq                    4.3.4                h0e60522_1    conda-forge\r\nzipp                      3.17.0             pyhd8ed1ab_0    conda-forge\r\nzlib                      1.2.13               hcfcfb64_5    conda-forge\r\nzstd                      1.5.5                h12be248_0    conda-forge\r\n``` \r\n- I also tried it with Pycharm on my default account, but the error was the same.\r\n- I know I managed to get the examples running in the past :-)\r\n- I already spent quit a bit of time browsing the internet for a solution, so I thought I would raise an Issue\r\n\r\nI greatly appreciate what you are doing, big respect!","author":{"url":"https://github.com/pichim","@type":"Person","name":"pichim"},"datePublished":"2023-10-17T07:03:08.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":23},"url":"https://github.com/219/Slycot/issues/219"}