Drop Python 3.8, confirm 3.13

Author: cretz

.github/workflows/build-binaries.yml

@@ -32,7 +32,7 @@ jobs:
           submodules: recursive
       - uses: actions/setup-python@v5
         with:
-          python-version: "3.12"
+          python-version: "3.13"
 
       # Install Rust locally for non-Linux (Linux uses an internal docker
       # command to build with cibuildwheel which uses rustup install defined

.github/workflows/ci.yml

@@ -12,30 +12,23 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python: ["3.8", "3.12"]
+        python: ["3.9", "3.13"]
         os: [ubuntu-latest, ubuntu-arm, macos-intel, macos-arm, windows-latest]
         include:
           - os: ubuntu-latest
-            python: "3.12"
+            python: "3.13"
             docsTarget: true
             cloudTestTarget: true
             clippyLinter: true
           - os: ubuntu-latest
-            python: "3.8"
+            python: "3.9"
             protoCheckTarget: true
           - os: ubuntu-arm
             runsOn: ubuntu-24.04-arm64-2-core
           - os: macos-intel
             runsOn: macos-12
           - os: macos-arm
             runsOn: macos-14
-        # macOS ARM 3.8 does not have an available Python build at
-        # https://raw.githubusercontent.com/actions/python-versions/main/versions-manifest.json.
-        # See https://github.com/actions/setup-python/issues/808 and
-        # https://github.com/actions/python-versions/pull/259.
-        exclude:
-          - os: macos-arm
-            python: "3.8"
     runs-on: ${{ matrix.runsOn || matrix.os }}
     steps:
       - uses: actions/checkout@v4
@@ -45,10 +38,10 @@ jobs:
       - uses: Swatinem/rust-cache@v2
         with:
           workspaces: temporalio/bridge -> target
-      - uses: actions/setup-python@v5
-        with:
-          # Pinning due to failed Windows builds on 3.12.5 https://github.com/temporalio/sdk-python/issues/637
-          python-version: ${{ matrix.python == '3.12' && '3.12.4' || matrix.python }}
+      # - uses: actions/setup-python@v5
+      #   with:
+      #     # Pinning due to failed Windows builds on 3.12.5 https://github.com/temporalio/sdk-python/issues/637
+      #     python-version: ${{ matrix.python == '3.12' && '3.12.4' || matrix.python }}
       - uses: arduino/setup-protoc@v3
         with:
           # TODO(cretz): Can upgrade proto when https://github.com/arduino/setup-protoc/issues/99 fixed

.github/workflows/run-bench.yml

@@ -37,7 +37,7 @@ jobs:
           workspaces: temporalio/bridge -> target
       - uses: actions/setup-python@v5
         with:
-          python-version: "3.12"
+          python-version: "3.13"
       - uses: arduino/setup-protoc@v3
         with:
           # TODO(cretz): Can upgrade proto when https://github.com/arduino/setup-protoc/issues/99 fixed

README.md

@@ -1,6 +1,6 @@
 ![Temporal Python SDK](https://assets.temporal.io/w/py-banner.svg)
 
-[![Python 3.8+](https://img.shields.io/pypi/pyversions/temporalio.svg?style=for-the-badge)](https://pypi.org/project/temporalio)
+[![Python 3.9+](https://img.shields.io/pypi/pyversions/temporalio.svg?style=for-the-badge)](https://pypi.org/project/temporalio)
 [![PyPI](https://img.shields.io/pypi/v/temporalio.svg?style=for-the-badge)](https://pypi.org/project/temporalio)
 [![MIT](https://img.shields.io/pypi/l/temporalio.svg?style=for-the-badge)](LICENSE)
 
@@ -1367,7 +1367,7 @@ The Python SDK is built to work with Python 3.8 and newer. It is built using
 
 To build the SDK from source for use as a dependency, the following prerequisites are required:
 
-* [Python](https://www.python.org/) >= 3.8
+* [Python](https://www.python.org/) >= 3.9
   * Make sure the latest version of `pip` is in use
 * [Rust](https://www.rust-lang.org/)
 * [Protobuf Compiler](https://protobuf.dev/)

poetry.lock

@@ -31,18 +31,27 @@ generate-setup-file = true
 "Bug Tracker" = "https://github.com/temporalio/sdk-python/issues"
 
 [tool.poetry.dependencies]
-grpcio =  {version = "^1.59.0", optional = true}
+grpcio = [
+  {version = "^1.59.0", python = "<3.13", optional = true},
+  {version = "^1.68.0", python = ">=3.13", optional = true}
+]
 opentelemetry-api = { version = "^1.11.1", optional = true }
 opentelemetry-sdk = { version = "^1.11.1", optional = true }
-protobuf = ">=3.20"
-python = "^3.8"
+protobuf = [
+  {version = ">=3.20,<5", python = "<3.13"},
+  {version = ">=5", python = ">=3.13"}
+]
+python = "^3.9"
 python-dateutil = { version = "^2.8.2", python = "<3.11" }
 types-protobuf = ">=3.20"
 typing-extensions = "^4.2.0"
 
 [tool.poetry.dev-dependencies]
 cibuildwheel = "^2.19.0"
-grpcio-tools = "^1.48.0"
+grpcio-tools = [
+  {version = "^1.48.0", python = "<3.13", optional = true},
+  {version = "^1.68.0", python = ">=3.13", optional = true}
+]
 mypy = "^1.0.0"
 mypy-protobuf = "^3.3.0"
 psutil = "^5.9.3"
@@ -119,11 +128,7 @@ filterwarnings = [
 ]
 
 [tool.cibuildwheel]
-# We only want the 3.8 64-bit build of each type. However, due to
-# https://github.com/pypa/cibuildwheel/issues/1278, we have to build macOS as
-# 3.9 until that is fixed. Our fix-wheel process will rename it to 3.8 and we
-# have manually confirmed this works with 3.8.
-build = "cp38-win_amd64 cp38-manylinux_x86_64 cp38-manylinux_aarch64 cp38-macosx_x86_64 cp39-macosx_arm64"
+build = "cp39-win_amd64 cp39-manylinux_x86_64 cp39-manylinux_aarch64 cp39-macosx_x86_64 cp39-macosx_arm64"
 build-verbosity = "1"
 
 [tool.cibuildwheel.linux]

pyproject.toml

@@ -36,16 +36,16 @@
             # All tags need ABI3
             pieces[1] = "abi3"
             if pieces[2].startswith("macosx_") and pieces[2].endswith("_arm64"):
-                # macOS ARM needs to be set to 3.8+ on 11+
-                pieces[0] = "cp38"
+                # macOS ARM needs to be set to 3.9+ on 11+
+                pieces[0] = "cp39"
                 pieces[2] = "macosx_11_0_arm64"
             elif pieces[2].startswith("macosx_") and pieces[2].endswith("_x86_64"):
-                # macOS x86 needs to be set to 3.8+ on 10.9+
-                pieces[0] = "cp38"
+                # macOS x86 needs to be set to 3.9+ on 10.9+
+                pieces[0] = "cp39"
                 pieces[2] = "macosx_10_9_x86_64"
             else:
-                # All others just need to be set to 3.8+
-                pieces[0] = "cp38"
+                # All others just need to be set to 3.9+
+                pieces[0] = "cp39"
             wheel_lines[i] = "Tag: " + "-".join(pieces)
             found_wheel_tag = True
     if not found_wheel_tag:

scripts/fix_wheel.py

@@ -11,7 +11,7 @@
         path="temporalio/bridge/Cargo.toml",
         binding=Binding.PyO3,
         py_limited_api=True,
-        features=["pyo3/abi3-py38"],
+        features=["pyo3/abi3-py39"],
         # Allow local release builds if requested
         debug=False if os.environ.get("TEMPORAL_BUILD_RELEASE") == "1" else None,
     )

scripts/setup_bridge.py

@@ -13,7 +13,7 @@ async-trait = "0.1"
 futures = "0.3"
 log = "0.4"
 prost = "0.13"
-pyo3 = { version = "0.20", features = ["extension-module", "abi3-py38", "anyhow"] }
+pyo3 = { version = "0.20", features = ["extension-module", "abi3-py39", "anyhow"] }
 pyo3-asyncio = { version = "0.20", features = ["tokio-runtime"] }
 pythonize = "0.20"
 temporal-client = { version = "0.1.0", path = "./sdk-core/client" }