Require Python 3.8, update CI

Python 3.6 and 3.7 have both been end-of-life for over a year. This PR starts requiring Python 3.8 and higher for Solara. CI and test code is modified in sync.

.github/workflows/test.yaml

@@ -33,7 +33,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v5
         with:
-          python-version: "3.10"
+          python-version: "3.12"
 
       - uses: actions/setup-node@v4
         with:
@@ -138,20 +138,13 @@ jobs:
         id: install_no_lock
         run: |
           mkdir -p .ci-package-locks/code-quality
-          pip install pre-commit
           pip freeze --exclude solara --exclude solara-enterprise > ${{ env.LOCK_FILE_LOCATION }}
           git diff --quiet || echo "HAS_DIFF=true" >> "$GITHUB_OUTPUT"
 
       - name: Install
         if: github.event_name != 'schedule' && steps.prepare.outputs.LOCKS_EXIST == 'true'
         run: pip install -r ${{ env.LOCK_FILE_LOCATION }}
 
-      - name: Install pre-commit
-        run: pre-commit install
-
-      - name: Run pre-commit
-        run: pre-commit run --all-files
-
       - name: Upload CI package locks
         if: steps.install_no_lock.outputs.HAS_DIFF == 'true' || steps.prepare.outputs.LOCKS_EXIST == 'false'
         uses: actions/upload-artifact@v4
@@ -161,15 +154,12 @@ jobs:
 
   test-install:
     needs: [build]
-    runs-on: ${{ matrix.os }}-${{(matrix.os == 'ubuntu' && matrix.python == '3.6') && '20.04' || (matrix.os == 'macos' && matrix.python == '3.6') && '13' || 'latest' }}
+    runs-on: ${{ matrix.os }}-'latest'
     strategy:
       fail-fast: false
       matrix:
         os: [ubuntu, macos, windows]
-        python: ["3.6", "3.10"]
-        exclude:
-          - os: windows
-            python: 3.6
+        python: ["3.8", "3.12"]
 
     steps:
       - name: Set up Python
@@ -229,13 +219,13 @@ jobs:
         # osx should work fine (and we test that locally often)
         os: [ubuntu, windows]
         # just 1 version, it's heavy
-        python-version: [3.8]
+        python-version: ["3.12"]
         ipywidgets_major: ["7", "8"]
         include:
           - ipywidgets_major: "7"
-            ipywidgets: "7.7"
+            ipywidgets: "7.8"
           - ipywidgets_major: "8"
-            ipywidgets: "8.0"
+            ipywidgets: "8.1"
     env:
       LOCK_FILE_LOCATION: .ci-package-locks/integration/os${{ matrix.os }}-python${{ matrix.python-version }}-ipywidgets${{ matrix.ipywidgets_major }}.txt
 
@@ -338,11 +328,11 @@ jobs:
         # osx should work fine (and we test that locally often)
         os: [ubuntu]
         # just 1 version, it's heavy
-        python-version: [3.8]
+        python-version: ["3.12"]
         ipywidgets_major: ["8"]
         include:
           - ipywidgets_major: "8"
-            ipywidgets: "8.0"
+            ipywidgets: "8.1"
     env:
       LOCK_FILE_LOCATION: .ci-package-locks/integration-vue3/os${{ matrix.os }}-ipywidgets${{ matrix.ipywidgets_major }}.txt
 
@@ -431,22 +421,14 @@ jobs:
 
   unit-test:
     needs: [build]
-    runs-on: ${{ matrix.os }}-${{(matrix.os == 'ubuntu' && matrix.python == '3.6') && '20.04' || (matrix.os == 'macos' && matrix.python == '3.6') && '13' || 'latest' }}
+    runs-on: ${{ matrix.os }}-latest
     strategy:
       fail-fast: false
       matrix:
         os: [ubuntu, macos, windows]
-        python: [3.6, 3.9]
-        ipywidgets: ["7.7", "8.0"]
-        exclude:
-          - os: windows
-            python: 3.6
-          - os: ubuntu
-            python: 3.6
-            ipywidgets: "8.0"
-          - os: macos
-            python: 3.6
-            ipywidgets: "8.0"
+        python: ["3.8", "3.12"]
+        ipywidgets: ["7.8", "8.1"]
+
     env:
       LOCK_FILE_LOCATION: .ci-package-locks/unit/os${{ matrix.os }}-python${{ matrix.python }}-ipywidgets${{ matrix.ipywidgets }}.txt
 
@@ -557,10 +539,10 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - name: Set up Python 3.7
+      - name: Set up Python 3.12
         uses: actions/setup-python@v5
         with:
-          python-version: 3.7
+          python-version: "3.12"
 
       - uses: actions/download-artifact@v4
         with:

.pre-commit-config.yaml

@@ -14,7 +14,7 @@ repos:
     rev: v3.17.0
     hooks:
     -   id: pyupgrade
-        args: [--py36-plus]
+        args: [--py38-plus]
   - repo: https://github.com/codespell-project/codespell
     rev: v2.2.6
     hooks:

packages/solara-enterprise/solara_enterprise/auth/middleware.py

@@ -1,5 +1,4 @@
 import json
-import sys
 import typing
 from base64 import b64decode, b64encode
 
@@ -10,10 +9,7 @@
 from starlette.requests import HTTPConnection
 from starlette.types import ASGIApp, Message, Receive, Scope, Send
 
-if sys.version_info >= (3, 8):  # pragma: no cover
-    from typing import Literal
-else:  # pragma: no cover
-    from typing_extensions import Literal
+from typing import Literal
 
 
 # mutable mapping that keeps track of whether it has been modified

pyproject.toml

@@ -1,5 +1,5 @@
 [build-system]
-requires = ["hatchling==1.22.2"]
+requires = ["hatchling==1.25.0"]
 build-backend = "hatchling.build"
 
 
@@ -13,6 +13,7 @@ dynamic = ["version", "description"]
 packages = [
     { include = "solara" }
 ]
+requires-python = ">= 3.8"
 dependencies = [
     "reacton>=1.7.1",
     "ipywidgets>=7.7",
@@ -69,7 +70,6 @@ markdown = [
     "markdown",
     "pymdown-extensions",
     "pygments",
-    "pygments==2.10; python_version < '3.7'",
 ]
 
 cache = [

solara/server/starlette.py

@@ -4,7 +4,6 @@
 import math
 import os
 from pathlib import Path
-import sys
 import threading
 import typing
 from typing import Any, Dict, List, Optional, Set, Union, cast
@@ -24,7 +23,7 @@
     has_solara_enterprise = True
 except ImportError:
     has_solara_enterprise = False
-if has_solara_enterprise and sys.version_info[:2] > (3, 6):
+if has_solara_enterprise:
     has_auth_support = True
     from solara_enterprise.auth.middleware import MutateDetectSessionMiddleware
     from solara_enterprise.auth.starlette import (
@@ -195,13 +194,6 @@ def serve(self):
         from uvicorn.config import Config
         from uvicorn.server import Server
 
-        if sys.version_info[:2] < (3, 7):
-            # make python 3.6 work
-            import asyncio
-
-            loop = asyncio.new_event_loop()
-            asyncio.set_event_loop(loop)
-
         # uvloop will trigger a: RuntimeError: There is no current event loop in thread 'fastapi-thread'
         config = Config(self.app, host=self.host, port=self.port, **self.kwargs, access_log=False, loop="asyncio")
         self.server = Server(config=config)

tests/integration/enterprise/oauth_test.py

@@ -1,5 +1,4 @@
 import os
-import sys
 
 import playwright.sync_api
 import pytest
@@ -10,9 +9,6 @@
 
 from solara.server import settings  # noqa
 
-if sys.version_info[:2] <= (3, 6):
-    pytest.skip("Test requires python 3.7 or higher", allow_module_level=True)
-
 
 @pytest.mark.skipif(not bool(os.environ.get("AUTH0_PASSWORD")), reason="AUTH0_PASSWORD not set")
 def test_oauth_from_app_auth0(page_session: playwright.sync_api.Page, solara_server, solara_app):

tests/integration/esm_test.py

@@ -1,4 +1,3 @@
-import sys
 from pathlib import Path
 
 import ipyreact
@@ -37,7 +36,6 @@ def PageDefineDuringRun():
     ipyreact.ValueWidget.element(_module="solara-test-dynamic", value=0, on_value=value.set)
 
 
-@pytest.mark.skipif(sys.version_info < (3, 7, 0), reason="ipyreact requires python 3.7 or higher")
 @pytest.mark.parametrize("app", ["esm_test:Page", "esm_test:PageDefineDuringRun"])
 def test_ipyreact(browser: playwright.sync_api.Browser, page_session: playwright.sync_api.Page, solara_server, solara_app, extra_include_path, app):
     with extra_include_path(HERE), solara_app(app):

tests/unit/patch_test.py

@@ -4,22 +4,6 @@
 
 from solara.server import kernel, kernel_context
 
-# import pytest
-
-
-# temporary disabled
-# # with python 3.6 we don't use the comm package
-# @pytest.mark.skipif(sys.version_info < (3, 7, 0), reason="ipykernel version too low")
-# def test_widget_error_message_outside_context(no_kernel_context):
-#     from ipyvuetify.Themes import theme
-
-#     theme.get_state()
-#     kernel_shared = kernel.Kernel()
-#     context1 = kernel_context.VirtualKernelContext(id="1", kernel=kernel_shared, session_id="session-1")
-#     with pytest.raises(RuntimeError):
-#         with context1:
-#             assert theme.model_id
-
 
 def test_widget_dict(no_kernel_context):
     kernel_shared = kernel.Kernel()