conda install -c conda-forge plotly python-kaleido

使用 conda 套件和 test.py 重現此故障，然後將其與正常運作的 pip 安裝進行比較。從 traceback 中顯示的 to_image 路徑所在的 plotly/io/_kaleido.py 開始，檢查如何找出已安裝的 Kaleido 版本。當透過 conda 安裝的套件能讓 test.py 在不出現 AttributeError 的情況下產生 fig.png 時，即表示完成。

plotly and python-kaleido Install in a brand new Conda env

❯❯❯ conda install -c conda-forge plotly python-kaleido -y
2 channel Terms of Service accepted
Channels:
 - conda-forge
 - defaults
Platform: osx-arm64
Collecting package metadata (repodata.json): done
Solving environment: done

## Package Plan ##

  environment location: /opt/miniconda3/envs/bsa3

  added / updated specs:
    - plotly
    - python-kaleido


The following NEW packages will be INSTALLED:

  narwhals           conda-forge/noarch::narwhals-1.48.0-pyhe01879c_0 
  packaging          conda-forge/noarch::packaging-25.0-pyh29332c3_1 
  plotly             conda-forge/noarch::plotly-6.2.0-pyhd8ed1ab_0 
  python-kaleido     conda-forge/noarch::python-kaleido-1.0.0-pyhe01879c_0 



Downloading and Extracting Packages:

Preparing transaction: done
Verifying transaction: done
Executing transaction: done

Packages that have been installed in the current environment

❯❯❯ conda list
# packages in environment at /opt/miniconda3/envs/bsa3:
#
# Name                     Version          Build               Channel
bzip2                      1.0.8            h99b78c6_7          conda-forge
ca-certificates            2025.7.14        hbd8a1cb_0          conda-forge
choreographer              1.0.9            pyhe01879c_0        conda-forge
libexpat                   2.7.1            hec049ff_0          conda-forge
libffi                     3.4.6            h1da3d7d_1          conda-forge
liblzma                    5.8.1            h39f12f2_2          conda-forge
libsqlite                  3.50.3           hf8de324_0          conda-forge
libzlib                    1.3.1            h8359307_2          conda-forge
logistro                   1.1.0            pyhe01879c_0        conda-forge
narwhals                   1.48.0           pyhe01879c_0        conda-forge
ncurses                    6.5              h5e97a16_3          conda-forge
openssl                    3.5.1            h81ee809_0          conda-forge
orjson                     3.11.0           py312h6f58b40_0     conda-forge
packaging                  25.0             pyh29332c3_1        conda-forge
pip                        25.1.1           pyh8b19718_0        conda-forge
plotly                     6.2.0            pyhd8ed1ab_0        conda-forge
python                     3.12.11          hc22306f_0_cpython  conda-forge
python-kaleido             1.0.0            pyhe01879c_0        conda-forge
python_abi                 3.12             8_cp312             conda-forge
readline                   8.2              h1d1bf99_2          conda-forge
setuptools                 80.9.0           pyhff2d567_0        conda-forge
simplejson                 3.20.1           py312hea69d52_0     conda-forge
tk                         8.6.13           h892fb3f_2          conda-forge
tzdata                     2025b            h78e105d_0          conda-forge
wheel                      0.45.1           pyhd8ed1ab_1        conda-forge

Create a file named test.py

import plotly.graph_objects as go

fig = go.Figure(data=go.Scatter(y=[2, 1, 4, 3]))


fig.write_image("fig.png")

❯❯❯ python3 test.py
/Users/gh/Desktop/TestFile/test.py:6: DeprecationWarning:


Support for Kaleido versions less than 1.0.0 is deprecated and will be removed after September 2025.
Please upgrade Kaleido to version 1.0.0 or greater (`pip install 'kaleido>=1.0.0'` or `pip install 'plotly[kaleido]'`).


Traceback (most recent call last):
  File "/Users/gh/Desktop/TestFile/test.py", line 6, in <module>
    fig.write_image("fig.png")
  File "/opt/miniconda3/envs/bsa3/lib/python3.12/site-packages/plotly/basedatatypes.py", line 3895, in write_image
    return pio.write_image(self, *args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/miniconda3/envs/bsa3/lib/python3.12/site-packages/plotly/io/_kaleido.py", line 510, in write_image
    img_data = to_image(
               ^^^^^^^^^
  File "/opt/miniconda3/envs/bsa3/lib/python3.12/site-packages/plotly/io/_kaleido.py", line 398, in to_image
    img_bytes = scope.transform(
                ^^^^^^^^^^^^^^^
AttributeError: 'NoneType' object has no attribute 'transform'

Install the requirement package through pip in a brand-new Conda environment: 'pip install kaleido plotly', and then execute the command:' python3 test.py', which will get the correct graph and will not cause any errors in the process.