save_image not working in python-kaleido v1

> library(plotly)
+ fig <- plot_ly(z = ~volcano) %>% add_surface()
+ save_image(fig, "surface-plot.svg")

Error in `py_get_attr()`:
! AttributeError: module 'kaleido' has no attribute 'scopes'
Run `reticulate::py_last_error()` for details.
Hide Traceback
    ▆
 1. └─plotly::save_image(fig, "surface-plot.svg")
 2.   └─plotly::kaleido()
 3.     ├─kaleido$scopes
 4.     └─reticulate:::`$.python.builtin.module`(kaleido, "scopes")
 5.       └─reticulate::py_get_attr(x, name, FALSE)

I'm running the latest master branch version 4868a68f installed by:
remotes::install_github("plotly/plotly")

R=4.4.3
Python=3.12.12

I've noticed the merge
Add support for kaleido v1.0 (save_image()); fix CI #2447

It seems the merge #2447 didn't work as expected, since "kaleido.scopes.plotly has been removed in v1."

here's my Conda list:

# packages in environment at /Volumes/Data/miniconda3/envs/r-reticulate:
#
# Name                     Version          Build                Channel
_openmp_mutex              4.5              7_kmp_llvm           conda-forge
bzip2                      1.0.8            hd037594_8           conda-forge
ca-certificates            2026.1.4         hbd8a1cb_0           conda-forge
choreographer              1.2.1            pyhcf101f3_0         conda-forge
colorama                   0.4.6            pyhd8ed1ab_1         conda-forge
exceptiongroup             1.3.1            pyhd8ed1ab_0         conda-forge
icu                        78.2             h38cb7af_0           conda-forge
iniconfig                  2.3.0            pyhd8ed1ab_0         conda-forge
libblas                    3.11.0           5_h51639a9_openblas  conda-forge
libcblas                   3.11.0           5_hb0561ab_openblas  conda-forge
libcxx                     21.1.8           hf598326_0           conda-forge
libexpat                   2.7.3            haf25636_0           conda-forge
libffi                     3.5.2            he5f378a_0           conda-forge
libgcc                     15.2.0           hcbb3090_16          conda-forge
libgfortran                15.2.0           h07b0088_16          conda-forge
libgfortran5               15.2.0           hdae7583_16          conda-forge
liblapack                  3.11.0           5_hd9741b5_openblas  conda-forge
liblzma                    5.8.2            h8088a28_0           conda-forge
libopenblas                0.3.30           openmp_ha158390_4    conda-forge
libsqlite                  3.51.2           h1ae2325_0           conda-forge
libzlib                    1.3.1            h8359307_2           conda-forge
llvm-openmp                21.1.8           h4a912ad_0           conda-forge
logistro                   2.0.1            pyhcf101f3_0         conda-forge
narwhals                   2.15.0           pyhcf101f3_0         conda-forge
ncurses                    6.5              h5e97a16_3           conda-forge
numpy                      2.4.1            py312he281c53_0      conda-forge
openssl                    3.6.0            h5503f6c_0           conda-forge
orjson                     3.11.5           py312h6f167cc_0      conda-forge
packaging                  26.0             pyhcf101f3_0         conda-forge
pip                        25.3             pyh8b19718_0         conda-forge
plotly                     6.0.0            py_0                 plotly
pluggy                     1.6.0            pyhf9edf01_1         conda-forge
pygments                   2.19.2           pyhd8ed1ab_0         conda-forge
pytest                     9.0.2            pyhcf101f3_0         conda-forge
pytest-timeout             2.4.0            pyhd8ed1ab_0         conda-forge
python                     3.12.12          h18782d2_1_cpython   conda-forge
python-kaleido             1.2.0            pyhcf101f3_0         conda-forge
python_abi                 3.12             8_cp312              conda-forge
readline                   8.3              h46df422_0           conda-forge
setuptools                 80.10.1          pyh332efcf_0         conda-forge
simplejson                 3.20.2           py312h4409184_1      conda-forge
tk                         8.6.13           h892fb3f_3           conda-forge
tomli                      2.4.0            pyhcf101f3_0         conda-forge
typing_extensions          4.15.0           pyhcf101f3_0         conda-forge
tzdata                     2025c            hc9c84f9_1           conda-forge
wheel                      0.46.3           pyhd8ed1ab_0         conda-forge

Fix save_image() compatibility with kaleido v1 (#2475)

Thanks for reporting this! I've pushed a fix in commit b1103b2.

The issue was that the code was using tryNULL(kaleido$scopes) to detect whether kaleido v1 was installed, but accessing a non-existent Python attribute can throw an AttributeError that doesn't always get caught properly by R's tryCatch. The fix uses reticulate::py_has_attr() instead, which safely checks for attribute existence without triggering the error.

Would you mind reinstalling from GitHub and letting me know if this resolves the issue for you?

remotes::install_github("plotly/plotly.R")

Thanks again for the detailed report!

@ZacharyHu0

I had the same issue as @ZacharyHu0. The fix solves this error; however, on my Windows laptop I do now instead get the error

Error in py_run_string_impl(code, local, convert) : 
    File "<string>", line 1
    import json; fig = json.load(open('C:\Users\DOMINI~1\AppData\Local\Temp\Rtmpa49Ihy\file26a4639245df.json'))
                                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
SyntaxError: (unicode error) 'unicodeescape' codec can't decode bytes in position 2-3: truncated \UXXXXXXXX escape

when running save_image(). It seems to me like the temporary file path is not adjusted properly to use / instead of \ when being passed to py_run_string() within newKaleidoScope().

Edit:
As a suggestion, the line 138 in the file kaleido.R should read normalizePath(tmp_json, winslash = "/").

Thanks for reporting. Would you like to contribute a PR and verify the fix?

I would love to, but unfortunately I do not have the time currently.

Would you mind reinstalling from GitHub and letting me know if this resolves the issue for you?

remotes::install_github("plotly/plotly.R")

I can confirm the fix works smoothly.
Thank you for your contribution to this community !

my Conda environment for reference:

r-plotly           4.12.0.9000           [f7acae4]
kaleido           1.2.0

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save_image not working in python-kaleido v1 #2475

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save_image not working in python-kaleido v1 #2475

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ZacharyHu0 commented on Jan 23, 2026

cpsievert commented on Jan 23, 2026

dschulz13 commented on Jan 25, 2026

cpsievert commented on Jan 26, 2026

dschulz13 commented on Jan 27, 2026

ZacharyHu0 commented on Jan 30, 2026

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