Merge pull request #3845 from plotly/drop-py-3.8

Drop Python 3.8 support

Author: T4rk1n

.github/workflows/testing.yml

@@ -70,7 +70,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.8", "3.12"]
+        python-version: ["3.9", "3.12"]
 
     steps:
       - name: Checkout repository
@@ -123,7 +123,7 @@ jobs:
 
       - name: Run lint
         env:
-          PYLINT_EXTRA_ARGS: ${{ matrix.python-version == '3.8' && '--ignored-modules=mcp' || '' }}
+          PYLINT_EXTRA_ARGS: ${{ matrix.python-version == '3.9' && '--ignored-modules=mcp' || '' }}
         run: npm run lint
 
       - name: Run unit tests
@@ -615,7 +615,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.8", "3.12"]
+        python-version: ["3.9", "3.12"]
         test-group: ["1", "2", "3"]
 
     env:
@@ -719,7 +719,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.8", "3.12"]
+        python-version: ["3.9", "3.12"]
 
     env:
       PERCY_TOKEN: ${{ matrix.python-version == '3.12' && secrets.PERCY_TOKEN || '' }}
@@ -866,7 +866,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.8", "3.12"]
+        python-version: ["3.9", "3.12"]
 
     steps:
       - name: Checkout repository
@@ -914,7 +914,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.8", "3.12"]
+        python-version: ["3.9", "3.12"]
         test-group: ["1", "2", "3"]
 
     env:

CHANGELOG.md

@@ -9,6 +9,9 @@ This project adheres to [Semantic Versioning](https://semver.org/).
 - [#3819](https://github.com/plotly/dash/pull/3819) Fix `RuntimeError: No active request in context` when a non-Dash path falls through to the FastAPI catch-all route. Fixes [#3812](https://github.com/plotly/dash/issues/3812).
 - [#3838](https://github.com/plotly/dash/pull/3838) Replace `mcp` dependency with inline types
 
+## Changed
+- Drop support for Python 3.8 (end-of-life since October 2024). The minimum supported version is now Python 3.9.
+
 ## [4.3.0] - 2026-06-18
 
 ## Added

setup.py

@@ -27,7 +27,7 @@ def read_req_file(req_type):
     long_description=io.open("README.md", encoding="utf-8").read(),  # pylint: disable=consider-using-with
     long_description_content_type="text/markdown",
     install_requires=read_req_file("install"),
-    python_requires=">=3.8",
+    python_requires=">=3.9",
     extras_require={
         "async": read_req_file("async"),
         "ci": read_req_file("ci"),
@@ -71,7 +71,6 @@ def read_req_file(req_type):
         "License :: OSI Approved :: MIT License",
         "Programming Language :: Python",
         "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: 3.11",