Markdown/HTML images not displaying #89

alexandermichels · 2022-02-23T21:35:53Z

Description

When using nbclassic (0.3.5 tested, others may be affected) images in notebooks made with Markdown (![](logo.png)) and HTML (<img src="logo.png">) do not work. Markdown images show a blank cell and HTML images show a broken image icon. Clicking on the image and "Open image in New Tab" directs to "/edit/logo.png". This same bug was reported in the jupyter/notebook repo (jupyter/notebook#6267), but through some debugging I believe it is an nbclassic issue. I have been able to reproduce the issue running the container itself locally and on JupyterHub.

Reproduce

Launch the container. I used the command: docker run -it -p 8888:8888 -p 8889:8889 jupyter/minimal-notebook:2022-01-12. I mapped two ports because I used the terminal in Jupyter to run jupyter nbclassic.
Open the terminal and run jupyter nbclassic.
Create a notebook with the default Python 3 kernel.
Get some image. I used !wget -O logo.png cybergisx.cigi.illinois.edu/hub/logo.
Try to display the image with ![](logo.png) or <img src="logo.png">.

We had this issue when we upgraded our JupyterHub (https://cybergisx.cigi.illinois.edu/) and debugged it through a lot of trial and error.

Expected behavior

I expect the images to display just as they do in jupyter/notebook. The image below shows the result from the reproduce procedure with notebook on the left and nbclassic on the right, both displaying the same notebook:

Context

Operating System and version: jupyter/minimal-notebook:2022-01-12 run with Docker on top of Linux Mint 20
Browser and version: Version 98.0.4758.80 (Official Build) (64-bit)
Jupyter version:

> jupyter --version
Selected Jupyter core packages...
IPython          : 7.31.0
ipykernel        : 6.6.1
ipywidgets       : not installed
jupyter_client   : 7.1.0
jupyter_core     : 4.9.1
jupyter_server   : 1.13.1
jupyterlab       : 3.2.6
nbclient         : 0.5.9
nbconvert        : 6.4.0
nbformat         : 5.1.3
notebook         : 6.4.6
qtconsole        : not installed
traitlets        : 5.1.1

> jupyter nbclassic --version
6.4.6

> pip list | grep nbclassic
nbclassic                     0.3.5

Troubleshoot Output

$PATH: /opt/conda/bin /opt/conda/condabin /opt/conda/bin /usr/local/sbin /usr/local/bin /usr/sbin /usr/bin /sbin /bin

sys.path:
/opt/conda/bin
/opt/conda/lib/python39.zip
/opt/conda/lib/python3.9
/opt/conda/lib/python3.9/lib-dynload
/opt/conda/lib/python3.9/site-packages

sys.executable:
/opt/conda/bin/python

sys.version:
3.9.7 | packaged by conda-forge | (default, Sep 29 2021, 19:20:46)
[GCC 9.4.0]

platform.platform():
Linux-5.4.0-99-generic-x86_64-with-glibc2.31

which -a jupyter:
/opt/conda/bin/jupyter
/opt/conda/bin/jupyter

pip list:
Package Version
----------------------------- ---------
alembic 1.7.5
anyio 3.5.0
argon2-cffi 21.3.0
argon2-cffi-bindings 21.2.0
async-generator 1.10
attrs 21.4.0
Babel 2.9.1
backcall 0.2.0
backports.functools-lru-cache 1.6.4
bleach 4.1.0
blinker 1.4
brotlipy 0.7.0
certifi 2021.10.8
certipy 0.1.3
cffi 1.15.0
charset-normalizer 2.0.10
colorama 0.4.4
conda 4.11.0
conda-package-handling 1.7.3
cryptography 36.0.1
debugpy 1.5.1
decorator 5.1.1
defusedxml 0.7.1
entrypoints 0.3
flit_core 3.6.0
greenlet 1.1.2
idna 3.1
importlib-metadata 4.10.0
importlib-resources 5.4.0
ipykernel 6.6.1
ipython 7.31.0
ipython-genutils 0.2.0
jedi 0.18.1
Jinja2 3.0.3
json5 0.9.5
jsonschema 4.3.3
jupyter-client 7.1.0
jupyter-core 4.9.1
jupyter-server 1.13.1
jupyter-telemetry 0.1.0
jupyterhub 2.0.2
jupyterlab 3.2.6
jupyterlab-pygments 0.1.2
jupyterlab-server 2.10.3
libmambapy 0.19.1
Mako 1.1.6
mamba 0.19.1
MarkupSafe 2.0.1
matplotlib-inline 0.1.3
mistune 0.8.4
nbclassic 0.3.5
nbclient 0.5.9
nbconvert 6.4.0
nbformat 5.1.3
nest-asyncio 1.5.4
notebook 6.4.6
oauthlib 3.1.1
packaging 21.3
pamela 1.0.0
pandocfilters 1.5.0
parso 0.8.3
pexpect 4.8.0
pickleshare 0.7.5
pip 21.3.1
prometheus-client 0.12.0
prompt-toolkit 3.0.24
psutil 5.9.0
ptyprocess 0.7.0
pycosat 0.6.3
pycparser 2.21
pycurl 7.44.1
Pygments 2.11.2
PyJWT 2.3.0
pyOpenSSL 21.0.0
pyparsing 3.0.6
pyrsistent 0.18.0
PySocks 1.7.1
python-dateutil 2.8.2
python-json-logger 2.0.1
pytz 2021.3
pyzmq 22.3.0
requests 2.27.1
ruamel.yaml 0.17.19
ruamel.yaml.clib 0.2.6
ruamel-yaml-conda 0.15.80
Send2Trash 1.8.0
setuptools 60.5.0
six 1.16.0
sniffio 1.2.0
SQLAlchemy 1.4.29
terminado 0.12.1
testpath 0.5.0
tornado 6.1
tqdm 4.62.3
traitlets 5.1.1
urllib3 1.26.8
wcwidth 0.2.5
webencodings 0.5.1
websocket-client 1.2.3
wheel 0.37.1
zipp 3.7.0

conda list:
# packages in environment at /opt/conda:
#
# Name Version Build Channel
_libgcc_mutex 0.1 conda_forge conda-forge
_openmp_mutex 4.5 1_gnu conda-forge
alembic 1.7.5 pyhd8ed1ab_0 conda-forge
anyio 3.5.0 py39hf3d152e_0 conda-forge
argon2-cffi 21.3.0 pyhd8ed1ab_0 conda-forge
argon2-cffi-bindings 21.2.0 py39h3811e60_1 conda-forge
async_generator 1.10 py_0 conda-forge
attrs 21.4.0 pyhd8ed1ab_0 conda-forge
babel 2.9.1 pyh44b312d_0 conda-forge
backcall 0.2.0 pyh9f0ad1d_0 conda-forge
backports 1.0 py_2 conda-forge
backports.functools_lru_cache 1.6.4 pyhd8ed1ab_0 conda-forge
bleach 4.1.0 pyhd8ed1ab_0 conda-forge
blinker 1.4 py_1 conda-forge
brotlipy 0.7.0 py39h3811e60_1003 conda-forge
bzip2 1.0.8 h7f98852_4 conda-forge
c-ares 1.18.1 h7f98852_0 conda-forge
ca-certificates 2021.10.8 ha878542_0 conda-forge
certifi 2021.10.8 py39hf3d152e_1 conda-forge
certipy 0.1.3 py_0 conda-forge
cffi 1.15.0 py39h4bc2ebd_0 conda-forge
charset-normalizer 2.0.10 pyhd8ed1ab_0 conda-forge
colorama 0.4.4 pyh9f0ad1d_0 conda-forge
conda 4.11.0 py39hf3d152e_0 conda-forge
conda-package-handling 1.7.3 py39h3811e60_1 conda-forge
configurable-http-proxy 4.5.0 node17_h7e777a6_2 conda-forge
cryptography 36.0.1 py39h95dcef6_0 conda-forge
debugpy 1.5.1 py39he80948d_0 conda-forge
decorator 5.1.1 pyhd8ed1ab_0 conda-forge
defusedxml 0.7.1 pyhd8ed1ab_0 conda-forge
entrypoints 0.3 pyhd8ed1ab_1003 conda-forge
flit-core 3.6.0 pyhd8ed1ab_0 conda-forge
greenlet 1.1.2 py39he80948d_1 conda-forge
icu 69.1 h9c3ff4c_0 conda-forge
idna 3.1 pyhd3deb0d_0 conda-forge
importlib-metadata 4.10.0 py39hf3d152e_0 conda-forge
importlib_resources 5.4.0 pyhd8ed1ab_0 conda-forge
ipykernel 6.6.1 py39hef51801_0 conda-forge
ipython 7.31.0 py39hf3d152e_0 conda-forge
ipython_genutils 0.2.0 py_1 conda-forge
jedi 0.18.1 py39hf3d152e_0 conda-forge
jinja2 3.0.3 pyhd8ed1ab_0 conda-forge
json5 0.9.5 pyh9f0ad1d_0 conda-forge
jsonschema 4.3.3 pyhd8ed1ab_0 conda-forge
jupyter_client 7.1.0 pyhd8ed1ab_0 conda-forge
jupyter_core 4.9.1 py39hf3d152e_1 conda-forge
jupyter_server 1.13.1 pyhd8ed1ab_0 conda-forge
jupyter_telemetry 0.1.0 pyhd8ed1ab_1 conda-forge
jupyterhub 2.0.2 hd8ed1ab_0 conda-forge
jupyterhub-base 2.0.2 pyhd8ed1ab_0 conda-forge
jupyterlab 3.2.6 pyhd8ed1ab_0 conda-forge
jupyterlab_pygments 0.1.2 pyh9f0ad1d_0 conda-forge
jupyterlab_server 2.10.3 pyhd8ed1ab_0 conda-forge
krb5 1.19.2 hcc1bbae_3 conda-forge
ld_impl_linux-64 2.36.1 hea4e1c9_2 conda-forge
libarchive 3.5.2 hccf745f_1 conda-forge
libcurl 7.81.0 h2574ce0_0 conda-forge
libedit 3.1.20191231 he28a2e2_2 conda-forge
libev 4.33 h516909a_1 conda-forge
libffi 3.4.2 h7f98852_5 conda-forge
libgcc-ng 11.2.0 h1d223b6_11 conda-forge
libgomp 11.2.0 h1d223b6_11 conda-forge
libiconv 1.16 h516909a_0 conda-forge
libmamba 0.19.1 h3985d26_0 conda-forge
libmambapy 0.19.1 py39h8bfa403_0 conda-forge
libnghttp2 1.43.0 h812cca2_1 conda-forge
libsodium 1.0.18 h36c2ea0_1 conda-forge
libsolv 0.7.19 h780b84a_5 conda-forge
libssh2 1.10.0 ha56f1ee_2 conda-forge
libstdcxx-ng 11.2.0 he4da1e4_11 conda-forge
libuv 1.42.0 h7f98852_0 conda-forge
libxml2 2.9.12 h885dcf4_1 conda-forge
libzlib 1.2.11 h36c2ea0_1013 conda-forge
lz4-c 1.9.3 h9c3ff4c_1 conda-forge
lzo 2.10 h516909a_1000 conda-forge
mako 1.1.6 pyhd8ed1ab_0 conda-forge
mamba 0.19.1 py39hfa8f2c8_0 conda-forge
markupsafe 2.0.1 py39h3811e60_1 conda-forge
matplotlib-inline 0.1.3 pyhd8ed1ab_0 conda-forge
mistune 0.8.4 py39h3811e60_1005 conda-forge
nbclassic 0.3.5 pyhd8ed1ab_0 conda-forge
nbclient 0.5.9 pyhd8ed1ab_0 conda-forge
nbconvert 6.4.0 py39hf3d152e_0 conda-forge
nbformat 5.1.3 pyhd8ed1ab_0 conda-forge
ncurses 6.2 h58526e2_4 conda-forge
nest-asyncio 1.5.4 pyhd8ed1ab_0 conda-forge
nodejs 17.1.0 h8ca31f7_2 conda-forge
notebook 6.4.6 pyha770c72_0 conda-forge
oauthlib 3.1.1 pyhd8ed1ab_0 conda-forge
openssl 1.1.1l h7f98852_0 conda-forge
packaging 21.3 pyhd8ed1ab_0 conda-forge
pamela 1.0.0 py_0 conda-forge
pandoc 2.16.2 h7f98852_0 conda-forge
pandocfilters 1.5.0 pyhd8ed1ab_0 conda-forge
parso 0.8.3 pyhd8ed1ab_0 conda-forge
pexpect 4.8.0 pyh9f0ad1d_2 conda-forge
pickleshare 0.7.5 py_1003 conda-forge
pip 21.3.1 pyhd8ed1ab_0 conda-forge
prometheus_client 0.12.0 pyhd8ed1ab_0 conda-forge
prompt-toolkit 3.0.24 pyha770c72_0 conda-forge
psutil 5.9.0 py39h3811e60_0 conda-forge
ptyprocess 0.7.0 pyhd3deb0d_0 conda-forge
pybind11-abi 4 hd8ed1ab_3 conda-forge
pycosat 0.6.3 py39h3811e60_1009 conda-forge
pycparser 2.21 pyhd8ed1ab_0 conda-forge
pycurl 7.44.1 py39h72e3413_1 conda-forge
pygments 2.11.2 pyhd8ed1ab_0 conda-forge
pyjwt 2.3.0 pyhd8ed1ab_1 conda-forge
pyopenssl 21.0.0 pyhd8ed1ab_0 conda-forge
pyparsing 3.0.6 pyhd8ed1ab_0 conda-forge
pyrsistent 0.18.0 py39h3811e60_0 conda-forge
pysocks 1.7.1 py39hf3d152e_4 conda-forge
python 3.9.7 hb7a2778_3_cpython conda-forge
python-dateutil 2.8.2 pyhd8ed1ab_0 conda-forge
python-json-logger 2.0.1 pyh9f0ad1d_0 conda-forge
python_abi 3.9 2_cp39 conda-forge
pytz 2021.3 pyhd8ed1ab_0 conda-forge
pyzmq 22.3.0 py39h37b5a0c_1 conda-forge
readline 8.1 h46c0cb4_0 conda-forge
reproc 14.2.3 h7f98852_0 conda-forge
reproc-cpp 14.2.3 h9c3ff4c_0 conda-forge
requests 2.27.1 pyhd8ed1ab_0 conda-forge
ruamel.yaml 0.17.19 py39h3811e60_0 conda-forge
ruamel.yaml.clib 0.2.6 py39h3811e60_0 conda-forge
ruamel_yaml 0.15.80 py39h3811e60_1006 conda-forge
send2trash 1.8.0 pyhd8ed1ab_0 conda-forge
setuptools 60.5.0 py39hf3d152e_0 conda-forge
six 1.16.0 pyh6c4a22f_0 conda-forge
sniffio 1.2.0 py39hf3d152e_2 conda-forge
sqlalchemy 1.4.29 py39h3811e60_0 conda-forge
sqlite 3.37.0 h9cd32fc_0 conda-forge
terminado 0.12.1 py39hf3d152e_1 conda-forge
testpath 0.5.0 pyhd8ed1ab_0 conda-forge
tk 8.6.11 h27826a3_1 conda-forge
tornado 6.1 py39h3811e60_2 conda-forge
tqdm 4.62.3 pyhd8ed1ab_0 conda-forge
traitlets 5.1.1 pyhd8ed1ab_0 conda-forge
tzdata 2021e he74cb21_0 conda-forge
urllib3 1.26.8 pyhd8ed1ab_1 conda-forge
wcwidth 0.2.5 pyh9f0ad1d_2 conda-forge
webencodings 0.5.1 py_1 conda-forge
websocket-client 1.2.3 pyhd8ed1ab_0 conda-forge
wheel 0.37.1 pyhd8ed1ab_0 conda-forge
xz 5.2.5 h516909a_1 conda-forge
yaml 0.2.5 h7f98852_2 conda-forge
yaml-cpp 0.6.3 he1b5a44_4 conda-forge
zeromq 4.3.4 h9c3ff4c_1 conda-forge
zipp 3.7.0 pyhd8ed1ab_0 conda-forge
zlib 1.2.11 h36c2ea0_1013 conda-forge
zstd 1.5.1 ha95c52a_0 conda-forge

conda env:
name: base
channels:
- conda-forge
dependencies:
- _libgcc_mutex=0.1=conda_forge
- _openmp_mutex=4.5=1_gnu
- alembic=1.7.5=pyhd8ed1ab_0
- anyio=3.5.0=py39hf3d152e_0
- argon2-cffi=21.3.0=pyhd8ed1ab_0
- argon2-cffi-bindings=21.2.0=py39h3811e60_1
- async_generator=1.10=py_0
- attrs=21.4.0=pyhd8ed1ab_0
- babel=2.9.1=pyh44b312d_0
- backcall=0.2.0=pyh9f0ad1d_0
- backports=1.0=py_2
- backports.functools_lru_cache=1.6.4=pyhd8ed1ab_0
- bleach=4.1.0=pyhd8ed1ab_0
- blinker=1.4=py_1
- brotlipy=0.7.0=py39h3811e60_1003
- bzip2=1.0.8=h7f98852_4
- c-ares=1.18.1=h7f98852_0
- ca-certificates=2021.10.8=ha878542_0
- certifi=2021.10.8=py39hf3d152e_1
- certipy=0.1.3=py_0
- cffi=1.15.0=py39h4bc2ebd_0
- charset-normalizer=2.0.10=pyhd8ed1ab_0
- colorama=0.4.4=pyh9f0ad1d_0
- conda=4.11.0=py39hf3d152e_0
- conda-package-handling=1.7.3=py39h3811e60_1
- configurable-http-proxy=4.5.0=node17_h7e777a6_2
- cryptography=36.0.1=py39h95dcef6_0
- debugpy=1.5.1=py39he80948d_0
- decorator=5.1.1=pyhd8ed1ab_0
- defusedxml=0.7.1=pyhd8ed1ab_0
- entrypoints=0.3=pyhd8ed1ab_1003
- flit-core=3.6.0=pyhd8ed1ab_0
- greenlet=1.1.2=py39he80948d_1
- icu=69.1=h9c3ff4c_0
- idna=3.1=pyhd3deb0d_0
- importlib-metadata=4.10.0=py39hf3d152e_0
- importlib_resources=5.4.0=pyhd8ed1ab_0
- ipykernel=6.6.1=py39hef51801_0
- ipython=7.31.0=py39hf3d152e_0
- ipython_genutils=0.2.0=py_1
- jedi=0.18.1=py39hf3d152e_0
- jinja2=3.0.3=pyhd8ed1ab_0
- json5=0.9.5=pyh9f0ad1d_0
- jsonschema=4.3.3=pyhd8ed1ab_0
- jupyter_client=7.1.0=pyhd8ed1ab_0
- jupyter_core=4.9.1=py39hf3d152e_1
- jupyter_server=1.13.1=pyhd8ed1ab_0
- jupyter_telemetry=0.1.0=pyhd8ed1ab_1
- jupyterhub=2.0.2=hd8ed1ab_0
- jupyterhub-base=2.0.2=pyhd8ed1ab_0
- jupyterlab=3.2.6=pyhd8ed1ab_0
- jupyterlab_pygments=0.1.2=pyh9f0ad1d_0
- jupyterlab_server=2.10.3=pyhd8ed1ab_0
- krb5=1.19.2=hcc1bbae_3
- ld_impl_linux-64=2.36.1=hea4e1c9_2
- libarchive=3.5.2=hccf745f_1
- libcurl=7.81.0=h2574ce0_0
- libedit=3.1.20191231=he28a2e2_2
- libev=4.33=h516909a_1
- libffi=3.4.2=h7f98852_5
- libgcc-ng=11.2.0=h1d223b6_11
- libgomp=11.2.0=h1d223b6_11
- libiconv=1.16=h516909a_0
- libmamba=0.19.1=h3985d26_0
- libmambapy=0.19.1=py39h8bfa403_0
- libnghttp2=1.43.0=h812cca2_1
- libsodium=1.0.18=h36c2ea0_1
- libsolv=0.7.19=h780b84a_5
- libssh2=1.10.0=ha56f1ee_2
- libstdcxx-ng=11.2.0=he4da1e4_11
- libuv=1.42.0=h7f98852_0
- libxml2=2.9.12=h885dcf4_1
- libzlib=1.2.11=h36c2ea0_1013
- lz4-c=1.9.3=h9c3ff4c_1
- lzo=2.10=h516909a_1000
- mako=1.1.6=pyhd8ed1ab_0
- mamba=0.19.1=py39hfa8f2c8_0
- markupsafe=2.0.1=py39h3811e60_1
- matplotlib-inline=0.1.3=pyhd8ed1ab_0
- mistune=0.8.4=py39h3811e60_1005
- nbclassic=0.3.5=pyhd8ed1ab_0
- nbclient=0.5.9=pyhd8ed1ab_0
- nbconvert=6.4.0=py39hf3d152e_0
- nbformat=5.1.3=pyhd8ed1ab_0
- ncurses=6.2=h58526e2_4
- nest-asyncio=1.5.4=pyhd8ed1ab_0
- nodejs=17.1.0=h8ca31f7_2
- notebook=6.4.6=pyha770c72_0
- oauthlib=3.1.1=pyhd8ed1ab_0
- openssl=1.1.1l=h7f98852_0
- packaging=21.3=pyhd8ed1ab_0
- pamela=1.0.0=py_0
- pandoc=2.16.2=h7f98852_0
- pandocfilters=1.5.0=pyhd8ed1ab_0
- parso=0.8.3=pyhd8ed1ab_0
- pexpect=4.8.0=pyh9f0ad1d_2
- pickleshare=0.7.5=py_1003
- pip=21.3.1=pyhd8ed1ab_0
- prometheus_client=0.12.0=pyhd8ed1ab_0
- prompt-toolkit=3.0.24=pyha770c72_0
- psutil=5.9.0=py39h3811e60_0
- ptyprocess=0.7.0=pyhd3deb0d_0
- pybind11-abi=4=hd8ed1ab_3
- pycosat=0.6.3=py39h3811e60_1009
- pycparser=2.21=pyhd8ed1ab_0
- pycurl=7.44.1=py39h72e3413_1
- pygments=2.11.2=pyhd8ed1ab_0
- pyjwt=2.3.0=pyhd8ed1ab_1
- pyopenssl=21.0.0=pyhd8ed1ab_0
- pyparsing=3.0.6=pyhd8ed1ab_0
- pyrsistent=0.18.0=py39h3811e60_0
- pysocks=1.7.1=py39hf3d152e_4
- python=3.9.7=hb7a2778_3_cpython
- python-dateutil=2.8.2=pyhd8ed1ab_0
- python-json-logger=2.0.1=pyh9f0ad1d_0
- python_abi=3.9=2_cp39
- pytz=2021.3=pyhd8ed1ab_0
- pyzmq=22.3.0=py39h37b5a0c_1
- readline=8.1=h46c0cb4_0
- reproc=14.2.3=h7f98852_0
- reproc-cpp=14.2.3=h9c3ff4c_0
- requests=2.27.1=pyhd8ed1ab_0
- ruamel.yaml=0.17.19=py39h3811e60_0
- ruamel.yaml.clib=0.2.6=py39h3811e60_0
- ruamel_yaml=0.15.80=py39h3811e60_1006
- send2trash=1.8.0=pyhd8ed1ab_0
- setuptools=60.5.0=py39hf3d152e_0
- six=1.16.0=pyh6c4a22f_0
- sniffio=1.2.0=py39hf3d152e_2
- sqlalchemy=1.4.29=py39h3811e60_0
- sqlite=3.37.0=h9cd32fc_0
- terminado=0.12.1=py39hf3d152e_1
- testpath=0.5.0=pyhd8ed1ab_0
- tk=8.6.11=h27826a3_1
- tornado=6.1=py39h3811e60_2
- tqdm=4.62.3=pyhd8ed1ab_0
- traitlets=5.1.1=pyhd8ed1ab_0
- tzdata=2021e=he74cb21_0
- urllib3=1.26.8=pyhd8ed1ab_1
- wcwidth=0.2.5=pyh9f0ad1d_2
- webencodings=0.5.1=py_1
- websocket-client=1.2.3=pyhd8ed1ab_0
- wheel=0.37.1=pyhd8ed1ab_0
- xz=5.2.5=h516909a_1
- yaml=0.2.5=h7f98852_2
- yaml-cpp=0.6.3=he1b5a44_4
- zeromq=4.3.4=h9c3ff4c_1
- zipp=3.7.0=pyhd8ed1ab_0
- zlib=1.2.11=h36c2ea0_1013
- zstd=1.5.1=ha95c52a_0
prefix: /opt/conda

Command Line Output

[I 2022-02-23 21:33:00.296 ServerApp] jupyterlab | extension was successfully linked.
[W 2022-02-23 21:33:00.303 NotebookApp] 'ip' has moved from NotebookApp to ServerApp. This config will be passed to ServerApp. Be sure to update your config beforeour next release.
[W 2022-02-23 21:33:00.303 NotebookApp] 'port' has moved from NotebookApp to ServerApp. This config will be passed to ServerApp. Be sure to update your config before our next release.
[W 2022-02-23 21:33:00.303 NotebookApp] 'port' has moved from NotebookApp to ServerApp. This config will be passed to ServerApp. Be sure to update your config before our next release.
[I 2022-02-23 21:33:00.547 ServerApp] nbclassic | extension was successfully linked.
[I 2022-02-23 21:33:00.585 ServerApp] nbclassic | extension was successfully loaded.
[I 2022-02-23 21:33:00.587 LabApp] JupyterLab extension loaded from /opt/conda/lib/python3.9/site-packages/jupyterlab
[I 2022-02-23 21:33:00.587 LabApp] JupyterLab application directory is /opt/conda/share/jupyter/lab
[I 2022-02-23 21:33:00.593 ServerApp] jupyterlab | extension was successfully loaded.
[I 2022-02-23 21:33:00.594 ServerApp] The port 8888 is already in use, trying another port.
[I 2022-02-23 21:33:00.594 ServerApp] The port 8889 is already in use, trying another port.
[I 2022-02-23 21:33:00.595 ServerApp] Serving notebooks from local directory: /home/jovyan
[I 2022-02-23 21:33:00.595 ServerApp] Jupyter Server 1.13.1 is running at:
[I 2022-02-23 21:33:00.595 ServerApp] http://e3a803f59c56:8890/lab?token=c8554df40c6ffdd409fcdd2c124d9c1eb9268c95cc40d039
[I 2022-02-23 21:33:00.595 ServerApp]  or http://127.0.0.1:8890/lab?token=c8554df40c6ffdd409fcdd2c124d9c1eb9268c95cc40d039
[I 2022-02-23 21:33:00.595 ServerApp] Use Control-C to stop this server and shut down all kernels (twice to skip confirmation).
[C 2022-02-23 21:33:00.600 ServerApp]
To access the server, open this file in a browser:
    file:///home/jovyan/.local/share/jupyter/runtime/jpserver-159-open.html
Or copy and paste one of these URLs:
    http://e3a803f59c56:8890/lab?token=c8554df40c6ffdd409fcdd2c124d9c1eb9268c95cc40d039
 or http://127.0.0.1:8890/lab?token=c8554df40c6ffdd409fcdd2c124d9c1eb9268c95cc40d039

The text was updated successfully, but these errors were encountered:

welcome · 2022-02-23T21:35:55Z

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jedbrown · 2022-08-09T12:04:36Z

I'm having the same issue with nbclassic-0.4.3 for local images. It works for remote images (<img src="https://...png" />) but not for local images (<img src="local.png" />). The local images work if I open the same notebook in Lab.

jedbrown · 2022-08-09T12:17:35Z

Hmm, I can work around this by prepending /files/ to relative paths, as in <img src="/files/local.png" /> or ![](/files/local.png).

$ jupyter --version
Selected Jupyter core packages...
IPython          : 7.31.1
ipykernel        : 6.4.2
ipywidgets       : 7.7.1
jupyter_client   : 7.3.4
jupyter_core     : 4.11.1
jupyter_server   : 1.18.1
jupyterlab       : 3.4.4
nbclient         : 0.5.13
nbconvert        : 6.5.0
nbformat         : 5.4.0
notebook         : 6.4.12
qtconsole        : 5.2.2
traitlets        : 5.1.1

jedbrown · 2022-08-22T16:04:11Z

This is quite disruptive when publishing notebooks via jupyter-book because the extra /files/ that I have to manually add to my notebooks to appease nbclassic aren't rewritten by jupyter-book. Does anyone know a workaround?

I'm tied to nbclassic when presenting in class because I use the RISE extension, but I also publish as a website using jupyter-book. Or maybe @choldgraf has a tip to get jupyter-book to do this path substitution as a work-around until this nbclassic issue is resolved?

scmmmh · 2022-09-12T13:20:11Z

This is likely to be fixed in #148.

jedbrown · 2022-09-12T13:38:55Z

Thanks! I can confirm local images work as expected after pip install git+https://github.com/jupyter/nbclassic@main.

alexandermichels · 2022-09-12T16:25:46Z

Working for me as well! Thanks!

echarles · 2022-10-24T07:56:39Z

Closing based on previous positive reports. Thx all.

alexandermichels added the bug Something isn't working label Feb 23, 2022

ivis-akaike mentioned this issue Aug 30, 2022

[bug] notebook can't display images, but lab can jupyter/notebook#6267

Closed

JasonWeill mentioned this issue Sep 15, 2022

Launch classic notebook breaks image links? jupyterlab/jupyterlab#13095

Closed

echarles closed this as completed Oct 24, 2022

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Markdown/HTML images not displaying #89

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