client-side IntInput widget in jupyterlab notebook sometimes not updated to final value when value changed multiple times programatically #7324
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Description
ALL software version info
This issue is with panel 1.5.0 (bokeh 3.5.2), I was not able to reproduce with panel 1.4.5 (bokeh 3.4.3).
Software Version Info
browser: Chrome Version 126.0.6478.126 (Official Build) (64-bit)
pip freeze output:
aiofiles==22.1.0
aiohttp==3.9.5
aiosignal==1.3.1
aiosqlite==0.20.0
alabaster==0.7.13
alembic==1.13.1
annotated-types==0.6.0
anyio==4.3.0
appdirs==1.4.4
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==2.14.0
backcall==0.2.0
beautifulsoup4==4.12.3
bleach==6.1.0
bokeh==3.5.2
bqplot==0.12.43
certifi==2024.2.2
cffi==1.16.0
charset-normalizer==3.3.2
click==8.1.7
cloudpickle==3.0.0
colorama==0.4.6
colorcet==3.1.0
comm==0.2.2
contourpy==1.2.1
copier==9.3.1
cycler==0.12.1
debugpy==1.8.1
decorator==5.1.1
defusedxml==0.7.1
deprecation==2.1.0
docutils==0.18.1
doit==0.36.0
dunamai==1.22.0
entrypoints==0.4
executing==2.0.1
fastapi==0.110.0
fastjsonschema==2.19.1
flexcache==0.3
flexparser==0.3.1
fonttools==4.43.1
fqdn==1.5.1
frozenlist==1.4.1
fsspec==2024.9.0
funcy==2.0
future==1.0.0
greenlet==3.0.3
h11==0.14.0
h5py==3.11.0
holoviews==1.18.3
httpcore==1.0.4
httpx==0.27.0
hvplot==0.10.0
idna==3.6
imagesize==1.4.1
importlib_metadata==7.0.2
ipydatawidgets==4.3.5
ipygany==0.5.0
ipykernel==6.29.3
ipython==8.22.2
ipython-genutils==0.2.0
ipyvolume==0.6.3
ipyvue==1.10.2
ipyvuetify==1.9.2
ipywebrtc==0.6.0
ipywidgets==8.1.2
isoduration==20.11.0
jedi==0.19.1
Jinja2==3.1.4
jinja2-ansible-filters==1.3.2
jinja2-time==0.2.0
json5==0.9.24
jsonpointer==2.4
jsonschema==4.21.1
jsonschema-specifications==2023.12.1
jupyter==1.0.0
jupyter-console==6.6.3
jupyter-events==0.9.1
jupyter-lsp==2.2.4
jupyter-ydoc==0.2.5
jupyter_client==8.6.1
jupyter_core==5.7.2
jupyter_packaging==0.12.3
jupyter_server==2.13.0
jupyter_server_fileid==0.9.2
jupyter_server_proxy==4.2.0
jupyter_server_terminals==0.5.3
jupyter_server_ydoc==0.8.0
jupyterlab==4.2.5
jupyterlab_pygments==0.3.0
jupyterlab_server==2.27.3
jupyterlab_widgets==3.0.10
jupyterlite==0.2.3
jupyterlite-core==0.2.3
jupyterlite-javascript-kernel==0.2.3
kiwisolver==1.4.5
linkify-it-py==2.0.3
Mako==1.3.2
Markdown==3.6
markdown-it-py==3.0.0
MarkupSafe==2.1.5
matplotlib==3.8.0
matplotlib-inline==0.1.6
mdit-py-plugins==0.4.1
mdurl==0.1.2
mistune==3.0.2
msgpack==1.0.8
msgpack-numpy==0.4.8
multidict==6.0.5
nbclassic==1.1.0
nbclient==0.10.0
nbconvert==7.16.2
nbformat==5.10.3
nest-asyncio==1.6.0
notebook==7.1.2
notebook_shim==0.2.4
numpy==1.26.4
numpydoc==1.6.0
overrides==7.7.0
packaging==24.0
pandas==2.2.1
pandocfilters==1.5.1
panel==1.5.0
param==2.1.0
parso==0.8.3
pathspec==0.12.1
pexpect==4.9.0
pickleshare==0.7.5
pillow==10.3.0
Pint==0.24.3
platformdirs==4.2.0
plotly==5.18.0
plumbum==1.8.3
pooch==1.8.2
prometheus_client==0.20.0
prompt-toolkit==3.0.43
psutil==5.9.8
ptyprocess==0.7.0
pure-eval==0.2.2
pycparser==2.21
pydantic==2.5.3
pydantic_core==2.14.6
Pygments==2.17.2
pyparsing==3.0.9
pyrsistent==0.19.1
python-dateutil==2.9.0.post0
python-dotenv==0.21.1
python-json-logger==2.0.7
python-multipart==0.0.5
pythreejs==2.4.2
pytz==2024.1
pyvista==0.44.1
pyviz_comms==3.0.2
PyYAML==6.0.1
pyyaml-include==2.1
pyzmq==25.1.2
qtconsole==5.5.1
QtPy==2.4.1
questionary==1.10.0
referencing==0.34.0
requests==2.31.0
rfc3339-validator==0.1.4
rfc3986-validator==0.1.1
rpds-py==0.18.0
scipy==1.11.3
scooby==0.10.0
Send2Trash==1.8.2
simpervisor==1.0.0
six==1.16.0
sniffio==1.3.1
snowballstemmer==2.2.0
soupsieve==2.5
Sphinx==7.2.6
sphinx-rtd-theme==1.3.0
sphinxcontrib-applehelp==1.0.7
sphinxcontrib-devhelp==1.0.5
sphinxcontrib-htmlhelp==2.0.4
sphinxcontrib-jquery==4.1
sphinxcontrib-jsmath==1.0.1
sphinxcontrib-qthelp==1.0.6
sphinxcontrib-serializinghtml==1.1.9
SQLAlchemy==2.0.29
sqlmodel==0.0.16
stack-data==0.6.3
starlette==0.36.3
tabulate==0.9.0
tenacity==8.2.3
terminado==0.18.1
tinycss2==1.2.1
tomli_w==1.0.0
tomlkit==0.12.5
tornado==6.4
tqdm==4.66.4
traitlets==5.14.2
traittypes==0.2.1
types-python-dateutil==2.9.0.20240316
typing_extensions==4.10.0
tzdata==2024.1
uc-micro-py==1.0.3
uncertainties==3.1.7
uri-template==1.3.0
urllib3==2.2.1
uvicorn==0.28.0
viola==0.3.8
vtk==9.3.1
watchfiles==0.22.0
wcwidth==0.2.13
webcolors==1.13
webencodings==0.5.1
websocket-client==1.7.0
websockets==12.0
widgetsnbextension==4.0.10
xyzservices==2024.6.0
y-py==0.6.2
yarl==1.9.4
ypy-websocket==0.8.4
zipp==3.18.1
Description of expected behavior and the observed behavior
I expect the inp widget to always end up displaying a value of 1 but it often stays at 0 (>50% of the time when I am spamming ctrl+enter on cell 3).
This may be some kind of race condition and difficult to reproduce.
Complete, minimal, self-contained example code that reproduces the issue
# code goes here between backticks
# cell 1
import panel as pn
pn.extension()
# cell 2
inp = pn.widgets.IntInput()
inp
# cell 3
inp.value = 0
inp.value = 1
inp.valueInterestingly, if I run another cell:
for i in range(100):
inp.value = i
inp.value
It seems to alternate between stopping at 98 or 99. Quite a strange behaviour, my best guess is that the update events to the client side are somehow ending up out of order when the component is updated in rapid succession.
Stack traceback and/or browser JavaScript console output
I restarted kernel and cleared the javascript console before running any cells, nothing relevant is printed while reproducing the bug:
bokeh-3.5.2.min.js:185 [bokeh 3.5.2] setting log level to: 'info'
Screenshots or screencasts of the bug in action
- I may be interested in making a pull request to address this
Activity