PYTHON-5479 Drop support for Python 3.9 (#2562)

Co-authored-by: Noah Stapp <[email protected]>

Author: blink1073

.evergreen/generated_configs/tasks.yml

@@ -22,7 +22,7 @@
 ##############
 
 ALL_VERSIONS = ["4.2", "4.4", "5.0", "6.0", "7.0", "8.0", "rapid", "latest"]
-CPYTHONS = ["3.10", "3.9", "3.11", "3.12", "3.13", "3.14"]
+CPYTHONS = ["3.10", "3.11", "3.12", "3.13", "3.14"]
 PYPYS = ["pypy3.10"]
 ALL_PYTHONS = CPYTHONS + PYPYS
 MIN_MAX_PYTHON = [CPYTHONS[0], CPYTHONS[-1]]

.evergreen/scripts/generate_config_utils.py

@@ -6,29 +6,29 @@ find_python3() {
     PYTHON=""
     # Find a suitable toolchain version, if available.
     if [ "$(uname -s)" = "Darwin" ]; then
-        PYTHON="/Library/Frameworks/Python.Framework/Versions/3.9/bin/python3"
+        PYTHON="/Library/Frameworks/Python.Framework/Versions/3.10/bin/python3"
     elif [ "Windows_NT" = "${OS:-}" ]; then # Magic variable in cygwin
-        PYTHON="C:/python/Python39/python.exe"
+        PYTHON="C:/python/Python310/python.exe"
     else
-        # Prefer our own toolchain, fall back to mongodb toolchain if it has Python 3.9+.
-        if [ -f "/opt/python/3.9/bin/python3" ]; then
+        # Prefer our own toolchain, fall back to mongodb toolchain if it has Python 3.10+.
+        if [ -f "/opt/python/3.10/bin/python3" ]; then
             PYTHON="/opt/python/Current/bin/python3"
-        elif is_python_39 "$(command -v /opt/mongodbtoolchain/v5/bin/python3)"; then
+        elif is_python_310 "$(command -v /opt/mongodbtoolchain/v5/bin/python3)"; then
             PYTHON="/opt/mongodbtoolchain/v5/bin/python3"
-        elif is_python_39 "$(command -v /opt/mongodbtoolchain/v4/bin/python3)"; then
+        elif is_python_310 "$(command -v /opt/mongodbtoolchain/v4/bin/python3)"; then
             PYTHON="/opt/mongodbtoolchain/v4/bin/python3"
-        elif is_python_39 "$(command -v /opt/mongodbtoolchain/v3/bin/python3)"; then
+        elif is_python_310 "$(command -v /opt/mongodbtoolchain/v3/bin/python3)"; then
             PYTHON="/opt/mongodbtoolchain/v3/bin/python3"
         fi
     fi
-    # Add a fallback system python3 if it is available and Python 3.9+.
+    # Add a fallback system python3 if it is available and Python 3.10+.
     if [ -z "$PYTHON" ]; then
-        if is_python_39 "$(command -v python3)"; then
+        if is_python_310 "$(command -v python3)"; then
             PYTHON="$(command -v python3)"
         fi
     fi
     if [ -z "$PYTHON" ]; then
-        echo "Cannot test without python3.9+ installed!"
+        echo "Cannot test without python3.10+ installed!"
         exit 1
     fi
     echo "$PYTHON"
@@ -99,15 +99,15 @@ testinstall () {
     fi
 }
 
-# Function that returns success if the provided Python binary is version 3.9 or later
+# Function that returns success if the provided Python binary is version 3.10 or later
 # Usage:
-# is_python_39 /path/to/python
+# is_python_310 /path/to/python
 # * param1: Python binary
-is_python_39() {
+is_python_310() {
     if [ -z "$1" ]; then
         return 1
-    elif $1 -c "import sys; exit(sys.version_info[:2] < (3, 9))"; then
-        # runs when sys.version_info[:2] >= (3, 9)
+    elif $1 -c "import sys; exit(sys.version_info[:2] < (3, 10))"; then
+        # runs when sys.version_info[:2] >= (3, 10)
         return 0
     else
         return 1
@@ -131,7 +131,7 @@ get_python_binary() {
     else
         PYTHON="/opt/python/$version/bin/python3"
     fi
-    if is_python_39 "$(command -v $PYTHON)"; then
+    if is_python_310 "$(command -v $PYTHON)"; then
         echo "$PYTHON"
     else
         echo "Could not find suitable python binary for '$version'"  >&2

.evergreen/utils.sh

@@ -70,34 +70,26 @@ jobs:
           platforms: all
 
       - name: Install cibuildwheel
-        # Note: the default manylinux is manylinux2014
+        # Note: the default manylinux is manylinux_2_28
         run: |
           python -m pip install -U pip
-          python -m pip install "cibuildwheel>=2.20,<3"
+          python -m pip install "cibuildwheel>=3.2.0,<4"
 
       - name: Build wheels
         env:
           CIBW_BUILD: ${{ matrix.buildplat[2] }}
         run: python -m cibuildwheel --output-dir wheelhouse
 
-      - name: Build manylinux1 wheels
-        if: ${{ matrix.buildplat[1] == 'manylinux_x86_64' || matrix.buildplat[1] == 'manylinux_i686' }}
-        env:
-          CIBW_MANYLINUX_X86_64_IMAGE: manylinux1
-          CIBW_MANYLINUX_I686_IMAGE: manylinux1
-          CIBW_BUILD: "cp39-${{ matrix.buildplat[1] }} cp39-${{ matrix.buildplat[1] }}"
-        run: python -m cibuildwheel --output-dir wheelhouse
-
       - name: Assert all versions in wheelhouse
         if: ${{ ! startsWith(matrix.buildplat[1], 'macos') }}
         run: |
-          ls wheelhouse/*cp39*.whl
           ls wheelhouse/*cp310*.whl
           ls wheelhouse/*cp311*.whl
           ls wheelhouse/*cp312*.whl
           ls wheelhouse/*cp313*.whl
+          ls wheelhouse/*cp314*.whl
           # Free-threading builds:
-          ls wheelhouse/*cp313t*.whl
+          ls wheelhouse/*cp314t*.whl
 
       - uses: actions/upload-artifact@v4
         with:
@@ -118,7 +110,7 @@ jobs:
       - uses: actions/setup-python@v6
         with:
           # Build sdist on lowest supported Python
-          python-version: '3.9'
+          python-version: "3.10"
 
       - name: Build SDist
         run: |

.github/workflows/dist.yml

@@ -26,7 +26,7 @@ jobs:
         uses: astral-sh/setup-uv@b75a909f75acd358c2196fb9a5f1299a9a8868a4 # v5
         with:
           enable-cache: true
-          python-version: "3.9"
+          python-version: "3.10"
       - name: Install just
         run: uv tool install rust-just
       - name: Install Python dependencies
@@ -56,7 +56,7 @@ jobs:
       matrix:
         # Tests currently only pass on ubuntu on GitHub Actions.
         os: [ubuntu-latest]
-        python-version: ["3.9", "pypy-3.10", "3.13t"]
+        python-version: ["3.10", "pypy-3.10", "3.13t"]
         mongodb-version: ["8.0"]
 
     name: CPython ${{ matrix.python-version }}-${{ matrix.os }}
@@ -87,7 +87,7 @@ jobs:
         uses: astral-sh/setup-uv@b75a909f75acd358c2196fb9a5f1299a9a8868a4 # v5
         with:
           enable-cache: true
-          python-version: "3.9"
+          python-version: "3.10"
       - name: Install just
         run: uv tool install rust-just
       - id: setup-mongodb
@@ -112,7 +112,7 @@ jobs:
         uses: astral-sh/setup-uv@b75a909f75acd358c2196fb9a5f1299a9a8868a4 # v5
         with:
           enable-cache: true
-          python-version: "3.9"
+          python-version: "3.10"
       - name: Install just
         run: uv tool install rust-just
       - name: Install dependencies
@@ -131,7 +131,7 @@ jobs:
         uses: astral-sh/setup-uv@b75a909f75acd358c2196fb9a5f1299a9a8868a4 # v5
         with:
           enable-cache: true
-          python-version: "3.9"
+          python-version: "3.10"
       - name: Install just
         run: uv tool install rust-just
       - name: Install dependencies
@@ -144,7 +144,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python: ["3.9", "3.11"]
+        python: ["3.10", "3.11"]
     steps:
       - uses: actions/checkout@v5
         with:
@@ -175,7 +175,7 @@ jobs:
           cache: 'pip'
           cache-dependency-path: 'pyproject.toml'
           # Build sdist on lowest supported Python
-          python-version: '3.9'
+          python-version: "3.10"
       - name: Build SDist
         shell: bash
         run: |
@@ -209,7 +209,7 @@ jobs:
             cache: 'pip'
             cache-dependency-path: 'sdist/test/pyproject.toml'
             # Test sdist on lowest supported Python
-            python-version: '3.9'
+            python-version: "3.10"
         - id: setup-mongodb
           uses: mongodb-labs/drivers-evergreen-tools@master
         - name: Run connect test from sdist
@@ -233,7 +233,7 @@ jobs:
         - name: Install uv
           uses: astral-sh/setup-uv@b75a909f75acd358c2196fb9a5f1299a9a8868a4 # v5
           with:
-            python-version: '3.9'
+            python-version: "3.10"
         - id: setup-mongodb
           uses: mongodb-labs/drivers-evergreen-tools@master
           with:

.github/workflows/test-python.yml

@@ -16,7 +16,7 @@ be of interest or that has already been addressed.
 
 ## Supported Interpreters
 
-PyMongo supports CPython 3.9+ and PyPy3.10+. Language features not
+PyMongo supports CPython 3.10+ and PyPy3.10+. Language features not
 supported by all interpreters can not be used.
 
 ## Style Guide

CONTRIBUTING.md

@@ -97,7 +97,7 @@ package that is incompatible with PyMongo.
 
 ## Dependencies
 
-PyMongo supports CPython 3.9+ and PyPy3.10+.
+PyMongo supports CPython 3.10+ and PyPy3.10+.
 
 Required dependencies:
 

README.md

@@ -6,6 +6,9 @@ Changes in Version 4.16.0 (XXXX/XX/XX)
 
 PyMongo 4.16 brings a number of changes including:
 
+.. warning:: PyMongo 4.16 drops support for Python 3.9: Python 3.10+ is now required.
+
+- Dropped support for Python 3.9.
 - Removed invalid documents from :class:`bson.errors.InvalidDocument` error messages as
   doing so may leak sensitive user data.
   Instead, invalid documents are stored in :attr:`bson.errors.InvalidDocument.document`.

doc/changelog.rst

@@ -46,7 +46,6 @@
 from pymongo.asynchronous.collection import AsyncCollection
 from pymongo.asynchronous.cursor import AsyncCursor
 from pymongo.asynchronous.database import AsyncDatabase
-from pymongo.asynchronous.helpers import anext
 from pymongo.common import validate_string
 from pymongo.errors import (
     BulkWriteError,

gridfs/asynchronous/grid_file.py

@@ -57,7 +57,6 @@
 from pymongo.synchronous.collection import Collection
 from pymongo.synchronous.cursor import Cursor
 from pymongo.synchronous.database import Database
-from pymongo.synchronous.helpers import next
 
 _IS_SYNC = True