.circleci/config.yml

@@ -58,9 +58,6 @@ commands:
             source .venv/bin/activate
             uv pip install .
             uv pip install -r ./test_requirements/requirements_optional.txt
-            cd js
-            npm ci
-            npm run build
 
       - when:
           condition:
@@ -117,6 +114,35 @@ commands:
             source .venv/bin/activate
             python -m pytest -x test_init/test_lazy_imports.py
 
+  test_io_kaleido_v0:
+    steps:
+      - checkout
+      - browser-tools/install-chrome
+      - browser-tools/install-chromedriver
+      - run:
+          name: Install dependencies
+          command: |
+            curl -LsSf https://astral.sh/uv/install.sh | sh
+            uv venv
+            source .venv/bin/activate
+            uv pip install .
+            uv pip install -r ./test_requirements/requirements_optional.txt
+            # Install Kaleido v0 instead of the v1 specified in requirements_optional.txt
+            uv pip uninstall kaleido
+            uv pip install kaleido==0.2.1
+      - run:
+          name: List installed packages and python version
+          command: |
+            source .venv/bin/activate
+            uv pip list
+            python --version
+      - run:
+          name: Test plotly.io image output with Kaleido v0
+          command: |
+            source .venv/bin/activate
+            python -m pytest tests/test_optional/test_kaleido
+          no_output_timeout: 20m
+
 jobs:
   check-code-formatting:
     docker:
@@ -129,7 +155,7 @@ jobs:
           command: |
             python -m venv venv
             . venv/bin/activate
-            pip install black==22.3.0
+            pip install black==25.1.0
       - run:
           name: Check formatting with black
           command: |
@@ -166,6 +192,17 @@ jobs:
           pandas_version: <<parameters.pandas_version>>
           numpy_version: <<parameters.numpy_version>>
 
+  test_kaleido_v0:
+    parameters:
+      python_version:
+        default: "3.12"
+        type: string
+    executor:
+      name: docker-container
+      python_version: <<parameters.python_version>>
+    steps:  
+      - test_io_kaleido_v0
+
   # Percy
   python_311_percy:
     docker:
@@ -269,22 +306,18 @@ jobs:
 
     steps:
       - checkout
-
       - run:
-          name: initial NPM Build
+          name: PyPI Build
           command: |
-            python -m venv venv
-            . venv/bin/activate
+            curl -LsSf https://astral.sh/uv/install.sh | sh
+            uv venv
+            source .venv/bin/activate
+            uv pip install build
+            uv pip install jupyter
             cd js
             npm ci
             npm run build
-            git status
-
-      - run:
-          name: PyPI Build
-          command: |
-            . venv/bin/activate
-            pip install build
+            cd ..
             python -m build --sdist --wheel -o dist
             cp -R dist output
             git status
@@ -310,7 +343,6 @@ jobs:
       - checkout
       - browser-tools/install-chrome
       - browser-tools/install-chromedriver
-
       - run:
           name: Install dependencies
           command: |
@@ -321,16 +353,11 @@ jobs:
             uv venv
             source .venv/bin/activate
             uv pip install -r requirements.txt
+            cd ..
             if [ "${CIRCLE_BRANCH}" != "doc-prod" ]; then
               uv pip uninstall plotly
-              cd ..
               uv pip install -e .
-              cd js
-              npm ci
-              npm run build
-              cd ../doc
             fi
-            cd ..
 
       - run:
           name: make html
@@ -422,7 +449,7 @@ workflows:
   release_build:
     jobs:
       - full_build
-
+  
   build:
     jobs:
       - test_core_py:
@@ -450,5 +477,10 @@ workflows:
           python_version: "3.9"
           pandas_version: "1.2.4"
           numpy_version: "1.26.4"
+      - test_kaleido_v0:
+          matrix:
+            parameters:
+              python_version:
+                - "3.12"
       - python_311_percy
-      - build-doc
+      - build-doc

.github/ISSUE_TEMPLATE.md

@@ -2,6 +2,6 @@ Thanks for your interest in Plotly.py!
 
 Before opening an issue, please search for existing and closed issues :)
 
-**Please** accompany bug reports with a reproducible example. Please use the [latest version](https://github.com/plotly/plotly.py/blob/master/CHANGELOG.md) of plotly.py in your report unless not applicable.
+**Please** accompany bug reports with a reproducible example. Please use the [latest version](https://github.com/plotly/plotly.py/blob/main/CHANGELOG.md) of plotly.py in your report unless not applicable.
 
 Note that GitHub Issues are meant to be used for bug reports and feature requests only. Implementation or usage questions should be asked on [community.plotly.com](https://community.plotly.com/c/graphing-libraries/python/10) or on Stack Overflow (tagged [`plotly`](https://stackoverflow.com/questions/tagged/plotly)).

.github/pull_request_template.md

@@ -6,7 +6,7 @@ below :-).
 
 ### Documentation PR
 
-- [ ] I've [seen the `doc/README.md` file](https://github.com/plotly/plotly.py/blob/master/doc/README.md)
+- [ ] I've [seen the `doc/README.md` file](https://github.com/plotly/plotly.py/blob/main/doc/README.md)
 - [ ] This change runs in the current version of Plotly on PyPI and targets the `doc-prod` branch OR it targets the `main` branch
 - [ ] If this PR modifies the first example in a page or adds a new one, it is a `px` example if at all possible
 - [ ] Every new/modified example has a descriptive title and motivating sentence or paragraph
@@ -27,7 +27,7 @@ below :-).
 
 ## Code PR
 
-- [ ] I have read through the [contributing notes](https://github.com/plotly/plotly.py/blob/master/CONTRIBUTING.md) and understand the structure of the package. In particular, if my PR modifies code of `plotly.graph_objects`, my modifications concern the `codegen` files and not generated files.
+- [ ] I have read through the [contributing notes](https://github.com/plotly/plotly.py/blob/main/CONTRIBUTING.md) and understand the structure of the package. In particular, if my PR modifies code of `plotly.graph_objects`, my modifications concern the `codegen` files and not generated files.
 - [ ] I have added tests (if submitting a new feature or correcting a bug) or
   modified existing tests.
 - [ ] For a new feature, I have added documentation examples in an existing or

.github/workflows/check-js-build.yml

@@ -0,0 +1,66 @@
+on: push
+
+jobs:
+  check-js-build:
+    name: Check JS build artifacts
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - name: Set up Python
+      uses: actions/setup-python@v5
+      with:
+        python-version: "3.x"
+
+    - name: Install Node
+      uses: actions/setup-node@v2
+      with:
+        node-version: '22'
+
+    - name: Copy current files to a temporary directory
+      run: |
+        cp -R plotly/labextension/ plotly/labextension-tmp/
+
+    - name: Install dependencies and build
+      run: |
+        curl -LsSf https://astral.sh/uv/install.sh | sh
+        uv venv
+        source .venv/bin/activate
+        uv pip install jupyter
+        cd js
+        npm ci
+        npm run build
+    - name: Check JupyterLab build artifacts
+      run: |
+        # 1. Hash contents of all static files, sort by content hash
+        find plotly/labextension/static -type f -exec sha256sum {} \; | awk '{print $1}' | sort > new_hashes.txt
+        find plotly/labextension-tmp/static -type f -exec sha256sum {} \; | awk '{print $1}' | sort > old_hashes.txt
+
+        # 2. Compare the sorted content hashes
+        diff old_hashes.txt new_hashes.txt > content_diff.txt
+
+        # Remove the "load" line from both package.json files before comparing
+        grep -v '"load": "static/' plotly/labextension/package.json > pkg1.json
+        grep -v '"load": "static/' plotly/labextension-tmp/package.json > pkg2.json
+
+        # Compare stripped versions
+        diff pkg1.json pkg2.json > package_json_diff.txt
+
+        # 5. Final check
+        if [ -s content_diff.txt ] || [ -s package_json_diff.txt ]; then
+        echo "❌ Build artifacts differ:"
+        echo "--- Unexpected diffs ---"
+        cat content_diff.txt
+        echo "--- Unexpected package.json diffs ---"
+        cat package_json_diff.txt
+        echo "Please replace the 'plotly/labextension' directory with the artifacts of this CI run."
+        exit 1
+        else
+        echo "✅ Build artifacts match expected output (ignoring known 'load' hash in package.json)."
+        fi
+
+    - name: Store the build artifacts from plotly/labextension
+      uses: actions/upload-artifact@v4
+      if: failure()
+      with:
+        name: labextension
+        path: plotly/labextension

.github/workflows/test-release.yml

@@ -0,0 +1,71 @@
+name: Publish Python 🐍 distribution 📦 to PyPI and TestPyPI
+
+on:
+  workflow_dispatch
+
+jobs:
+  build:
+    name: Build distribution 📦
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v4
+      with:
+        persist-credentials: false
+    - name: Set up Python
+      uses: actions/setup-python@v5
+      with:
+        python-version: "3.x"
+
+    - name: Install Node
+      uses: actions/setup-node@v2
+      with:
+        node-version: '22'
+
+    - name: Install npm dependencies
+      run: |
+        curl -LsSf https://astral.sh/uv/install.sh | sh
+        uv venv
+        source .venv/bin/activate
+        uv pip install jupyter
+        cd js
+        npm ci --verbose
+        npm run build --verbose
+
+    - name: Install pypa/build
+      run: >-
+        python3 -m
+        pip install
+        build
+        --user
+    - name: Build a binary wheel and a source tarball
+      run: python3 -m build
+    - name: Store the distribution packages
+      uses: actions/upload-artifact@v4
+      with:
+        name: python-package-distributions
+        path: dist/
+
+  publish-to-testpypi:
+    name: Publish Python 🐍 distribution 📦 to TestPyPI
+    needs:
+    - build
+    runs-on: ubuntu-latest
+
+    environment:
+      name: testpypi
+      url: https://test.pypi.org/p/plotly
+
+    permissions:
+      id-token: write  # IMPORTANT: mandatory for trusted publishing
+
+    steps:
+    - name: Download all the dists
+      uses: actions/download-artifact@v4
+      with:
+        name: python-package-distributions
+        path: dist/
+    - name: Publish distribution 📦 to TestPyPI
+      uses: pypa/gh-action-pypi-publish@release/v1
+      with:
+        repository-url: https://test.pypi.org/legacy/

.gitignore

@@ -59,7 +59,7 @@ doc/python/.mapbox_token
 doc/.ipynb_checkpoints
 tags
 doc/check-or-enforce-order.py
-plotly/package_data/widgetbundle.js
 
 tests/percy/*.html
 tests/percy/pandas2/*.html
+test_path.png

CHANGELOG.md

@@ -1,7 +1,32 @@
-# Change Log
+# Changelog
 All notable changes to this project will be documented in this file.
 This project adheres to [Semantic Versioning](http://semver.org/).
 
+## [6.1.2] - 2025-05-27
+
+### Fixed
+- Fix type checking and code highlighting for `graph_objects` classes [[#5199](https://github.com/plotly/plotly.py/pull/5199)]
+
+
+## [6.1.1] - 2025-05-20
+
+### Fixed
+- Prevent swallowing of `ValueError` when creating a figure with subplots [[#3888](https://github.com/plotly/plotly.py/pull/3888)]
+- Fix issue causing `fig.write_image()` to not generate an image [[#5193](https://github.com/plotly/plotly.py/pull/5193)]
+
+## [6.1.0] - 2025-05-15
+
+### Updated
+- Add support for Kaleido>=v1.0.0 for image generation [[#5062](https://github.com/plotly/plotly.py/pull/5062), [#5177](https://github.com/plotly/plotly.py/pull/5177)]
+- Reduce package bundle size by 18-24% via changes to code generation [[#4978](https://github.com/plotly/plotly.py/pull/4978)]
+
+### Fixed
+- Fix third-party widget display issues in v6 [[#5102](https://github.com/plotly/plotly.py/pull/5102)]
+- Add handling for case where `jupyterlab` or `notebook` is not installed [[#5104](https://github.com/plotly/plotly.py/pull/5104/files)]
+- Fix issue causing Plotly.js script to be embedded multiple times in Jupyter notebooks [[#5112](https://github.com/plotly/plotly.py/pull/5112)]
+- Re-add MIME renderer JupyterLab extension with JupyterLab 4 support to reduce file sizes for offline notebooks [[#5096](https://github.com/plotly/plotly.py/pull/5096)]
+- Fix issue preventing plots from rendering in HTML notebook export when using 'vscode+notebook' renderer [[#5154](https://github.com/plotly/plotly.py/pull/5154)]
+
 ## [6.0.1] - 2025-03-14
 
 ### Updated

CONTRIBUTING.md

@@ -169,6 +169,19 @@ and
 [`pip`](https://pip.pypa.io/en/stable/reference/pip_install/#install-editable)
 documentation on _development mode_.
 
+### Updating the `js/` directory
+**This is only necessary if you're making changes to files in the `js/` directory.**
+If you make changes to any files in the `js/` directory, you must run `npm install && npm run build` from the `js/` directory to rebuild the FigureWidget and JupyterLab extension.
+You must then commit the build artifacts produced in `plotly/labextension`. A CI job will verify that this step has been done correctly.
+
+**Notes on the contents of the `js/` directory:**
+The `js/` directory contains Javascript code which helps with using Plotly in Jupyter notebooks.
+
+There are two kinds of Jupyter support included in the `js/` directory:
+1. **Mime Renderer JupyterLab extension**: This is the default renderer for Plotly `Figure()` objects in Jupyter notebooks. The Plotly mime renderer JupyterLab extension is used automatically by JupyterLab / Jupyter Notebook
+when it sees the mimetype `application/vnd.plotly.v1+json` in the notebook output. The mime renderer loads `plotly.js` a single time and references it each time a Plotly figure is used in the notebook. This allows us to avoid embedding `plotly.js` in the notebook output. The JupyterLab extension source code is located at `js/src/mimeExtension.ts` and the compiled extension code is located at `plotly/labextension` in the built Python package. The command `jupyter labextension build` (which is one of the steps called by `npm run build`) compiles the extension and places the build artifacts in `plotly/labextension`. 
+2. **FigureWidget**: This is a more-interactive method for rendering Plotly charts in notebooks. FigureWidget used by creating a `FigureWidget()` object inside the notebook code (in place of a `Figure()`). It allows for communication between the Javascript frontend and Python backend, and requires the installation of an additional Python package (`anywidget`). The FigureWidget source code is located at `js/src/widget.ts`, and is included in the built Python package at `plotly/package_data/widgetbundle.js`. 
+
 ### Configure black code formatting
 
 This repo uses the [Black](https://black.readthedocs.io/en/stable/) code formatter,