Error with UI on launch: NotImplementedError: Widgets cannot be copied; custom implementation required

[jameshiggie]

Error with UI on launch

File /usr/local/.pyenv/versions/3.8.19/lib/python3.8/copy.py:153, in deepcopy(x, memo, _nil)
    151 copier = getattr(x, "__deepcopy__", None)
    152 if copier is not None:
--> 153     y = copier(memo)
    154 else:
    155     reductor = dispatch_table.get(cls)

File /usr/local/.pyenv/versions/3.8.19/lib/python3.8/site-packages/ipywidgets/widgets/widget.py:512, in Widget.__deepcopy__(self, memo)
    511 def __deepcopy__(self, memo):
--> 512     raise NotImplementedError("Widgets cannot be copied; custom implementation required")

NotImplementedError: Widgets cannot be copied; custom implementation required

[jameshiggie]

we found locking ipywidgets to 8.1.0 fixes this problem.

suspected bug linked to jupyter-widgets/ipywidgets#3780

[jameshiggie]

suggest a update to requirements.txt

Line 2: ipywidgets==8.1.0

[ysghandi]

We encountered the same issue and updating the ipywidgets==8.1.0 addresses the error.

[LucasJ15]

I am facing the same issue as this thread. Any more step by step information on how to fix the error? I do not see where I can edit the ipywidgets package to be 8.1.0

[imanbabaei]

When you open the DataLab project, click on the drop-down menu in the upper-right corner and select 'Terminal'. There, you can use the following command to check the ipywidgets version:
pip show ipywidgets

Run the following command to replace the current ipywidgets version:
pip install ipywidgets==8.1.0

We don't have access to Seeq Workbench, but we will release a fix soon! :)

[kpintar14]

I tried the work around described above and can confirm that pip show ipywidgets now displays Version: 8.1.0. However, I am still getting the same error 'NotImplementedError: Widgets cannot be copied; custom implementation required' when launching the add-on.

[imanbabaei]

Thank you for your comment!
At this moment, we don't have access to the Seeq platform in order to update the SysID package. It seems we need to update dependencies while avoiding overriding pre-installed packages on Seeq DataLab.

Could you please create a new DataLab project and run pip freeze in the terminal to generate a list of the currently installed packages?
Also, could you let us know which version of Seeq you're using?

[kpintar14]

Appreciate the quick response! Seeq Version = 2025-06-28-00-55-00.v0
Here is the list of pre-installed packages on a new Seeq Data Lab project:

Package                        Version
------------------------------ ----------------
aiohappyeyeballs               2.4.3
aiohttp                        3.10.11
aiosignal                      1.3.1
anyio                          4.3.0
argon2-cffi                    23.1.0
argon2-cffi-bindings           21.2.0
arrow                          1.3.0
asttokens                      2.4.1
async-lru                      2.0.4
attrs                          23.2.0
Babel                          2.15.0
beautifulsoup4                 4.12.3
bleach                         6.1.0
Bottleneck                     1.5.0
certifi                        2024.8.30
cffi                           1.16.0
cgroupspy                      0.2.3
charset-normalizer             3.3.2
chevron                        0.14.0
colorama                       0.4.6
comm                           0.2.2
contourpy                      1.2.1
cron-descriptor                1.4.3
cryptography                   44.0.1
cycler                         0.12.1
debugpy                        1.8.1
decorator                      5.1.1
defusedxml                     0.7.1
Deprecated                     1.2.14
executing                      2.0.1
fastjsonschema                 2.19.1
fonttools                      4.51.0
fqdn                           1.5.1
frozenlist                     1.5.0
gitdb                          4.0.11
GitPython                      3.1.43
h11                            0.16.0
httpcore                       1.0.9
httpx                          0.27.0
idna                           3.7
ipykernel                      6.29.4
ipylab                         1.0.0
ipython                        8.24.0
ipywidgets                     8.1.5
isoduration                    20.11.0
jedi                           0.19.1
Jinja2                         3.1.6
json5                          0.9.25
jsonpointer                    2.4
jsonschema                     4.22.0
jsonschema-specifications      2023.12.1
jupyter_client                 8.6.1
jupyter_core                   5.7.2
jupyter-events                 0.10.0
jupyter-lsp                    2.2.5
jupyter-resource-usage         1.1.1
jupyter_server                 2.14.2
jupyter-server-mathjax         0.2.6
jupyter_server_proxy           4.4.0
jupyter_server_terminals       0.5.3
jupyterlab                     4.4.2
jupyterlab_git                 0.51.1
jupyterlab-language-pack-de-DE 4.4.post0
jupyterlab-language-pack-es-ES 4.4.post0
jupyterlab-language-pack-fr-FR 4.4.post0
jupyterlab-language-pack-it-IT 4.4.post0
jupyterlab-language-pack-ja-JP 4.4.post0
jupyterlab-language-pack-ko-KR 4.4.post0
jupyterlab-language-pack-pt-BR 4.4.post0
jupyterlab-language-pack-zh-CN 4.4.post0
jupyterlab_pygments            0.3.0
jupyterlab_server              2.27.1
jupyterlab_widgets             3.0.13
kiwisolver                     1.4.5
lxml                           5.2.1
lxml_html_clean                0.4.1
Mako                           1.3.5
Markdown                       3.6
MarkupSafe                     2.0.1
matplotlib                     3.10.0
matplotlib-inline              0.1.7
mistune                        3.0.2
multidict                      6.1.0
nbclient                       0.7.4
nbconvert                      7.16.4
nbdime                         4.0.1
nbformat                       5.10.4
nest-asyncio                   1.6.0
notebook                       7.4.2
notebook_shim                  0.2.4
numpy                          1.26.4
overrides                      7.7.0
packaging                      24.0
pandas                         2.2.3
pandocfilters                  1.5.1
parsedatetime                  2.6
parso                          0.8.4
pexpect                        4.9.0
pillow                         10.3.0
pip                            25.1.1
platformdirs                   4.2.1
prometheus_client              0.20.0
prompt-toolkit                 3.0.43
propcache                      0.2.0
psutil                         5.9.8
ptyprocess                     0.7.0
pure-eval                      0.2.2
pycparser                      2.22
Pygments                       2.18.0
pyparsing                      3.1.2
python-dateutil                2.9.0.post0
python-json-logger             2.0.7
pytz                           2024.1
PyYAML                         6.0.1
pyzmq                          26.0.3
recurrent                      0.4.1
referencing                    0.35.1
requests                       2.32.3
rfc3339-validator              0.1.4
rfc3986-validator              0.1.1
rpds-py                        0.18.1
seeq                           66.28.1.20250628
seeq_datalab_api               0.1.0
seeq_datalab_extension         0.1.0
seeq-spy                       197.0
Send2Trash                     1.8.3
setuptools                     80.8.0
simpervisor                    1.0.0
six                            1.16.0
smmap                          5.0.1
sniffio                        1.3.1
soupsieve                      2.5
stack-data                     0.6.3
terminado                      0.18.1
tinycss2                       1.3.0
tornado                        6.5
traitlets                      5.14.3
types-python-dateutil          2.8.19.14
typing_extensions              4.11.0
tzdata                         2024.1
tzlocal                        5.2
uri-template                   1.3.0
urllib3                        2.2.3
voila                          0.5.8
wcwidth                        0.2.13
webcolors                      1.13
webencodings                   0.5.1
websocket-client               1.8.0
websockets                     12.0
wheel                          0.42.0
widgetsnbextension             4.0.13
wrapt                          1.16.0
yarl                           1.17.1
zipp                           3.21.0

[imanbabaei]

Just a quick update on this issue!
Attached is the wheel file that I tested on my system. For now, I fixed the version for ipywidgets==7.7.2 and plotly==5.24.1. The rest of the dependencies are more flexible and work with their latest version. For local installation, you might need to install Jupyter (pip install jupyter).
There are some improvements in the transfer function identification.

On the other hand, we are not aware of the latest changes in the add-on installation process and might need access to Seeq DataLab for further development. Meanwhile, if an error occurs during the installation process (main.py file) the only workaround is to use deployment notebook. (seeq_sysid/deployment_notebook/sysid_notebook.ipynb)

New developments coming soon! 🚀

seeq_sysid-1.0.2.dev0-py3-none-any.whl.zip