restore 3.9 support

Author: blink1073

.github/workflows/dist-python.yml

@@ -47,7 +47,7 @@ jobs:
 
       - uses: actions/setup-python@v5
         with:
-          python-version: "3.10"
+          python-version: "3.9"
           cache: 'pip'
           cache-dependency-path: 'bindings/python/pyproject.toml'
           allow-prereleases: true

.github/workflows/test-python.yml

@@ -43,7 +43,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest]
-        python-version: ["3.10", "3.13", "3.14"]
+        python-version: ["3.9", "3.13", "3.14"]
 
     steps:
       - uses: actions/checkout@v4

bindings/python/.evergreen/test.sh

@@ -31,6 +31,7 @@ elif [ "Darwin" = "$(uname -s)" ]; then
     export PYMONGOCRYPT_LIB=${MONGOCRYPT_DIR}/nocrypto/lib/libmongocrypt.dylib
     PYMONGOCRYPT_LIB_CRYPTO=${MONGOCRYPT_DIR}/lib/libmongocrypt.dylib
     PYTHONS=(
+          "/Library/Frameworks/Python.framework/Versions/3.9/bin/python3"
           "/Library/Frameworks/Python.framework/Versions/3.10/bin/python3"
           "/Library/Frameworks/Python.framework/Versions/3.11/bin/python3"
           "/Library/Frameworks/Python.framework/Versions/3.12/bin/python3"
@@ -58,6 +59,7 @@ else
         )
     else
         PYTHONS=(
+          "/opt/python/3.9/bin/python3"
           "/opt/python/3.10/bin/python3"
           "/opt/python/3.11/bin/python3"
           "/opt/python/3.12/bin/python3"

bindings/python/.evergreen/utils.sh

@@ -36,37 +36,37 @@ createvirtualenv () {
 # PYTHON = find_python3
 find_python3() {
     PYTHON=""
-    # Add a fallback system python3 if it is available and Python 3.10+.
-    if is_python_310 "$(command -v python3)"; then
+    # Add a fallback system python3 if it is available and Python 3.9+.
+    if is_python_39 "$(command -v python3)"; then
         PYTHON="$(command -v python3)"
     fi
     # Find a suitable toolchain version, if available.
     if [ "$(uname -s)" = "Darwin" ]; then
-        PYTHON="/Library/Frameworks/Python.Framework/Versions/3.10/bin/python3"
+        PYTHON="/Library/Frameworks/Python.Framework/Versions/3.9/bin/python3"
     elif [ "Windows_NT" = "${OS:-}" ]; then # Magic variable in cygwin
         PYTHON="C:/python/Python310/python.exe"
     else
-        # Prefer our own toolchain, fall back to mongodb toolchain if it has Python 3.10+.
-        if [ -f "/opt/python/3.10/bin/python3" ]; then
-            PYTHON="/opt/python/3.10/bin/python3"
-        elif is_python_310 "$(command -v /opt/mongodbtoolchain/v4/bin/python3)"; then
+        # Prefer our own toolchain, fall back to mongodb toolchain if it has Python 3.9+.
+        if [ -f "/opt/python/3.9/bin/python3" ]; then
+            PYTHON="/opt/python/3.9/bin/python3"
+        elif is_python_39 "$(command -v /opt/mongodbtoolchain/v4/bin/python3)"; then
             PYTHON="/opt/mongodbtoolchain/v4/bin/python3"
-        elif is_python_310 "$(command -v /opt/mongodbtoolchain/v3/bin/python3)"; then
+        elif is_python_39 "$(command -v /opt/mongodbtoolchain/v3/bin/python3)"; then
             PYTHON="/opt/mongodbtoolchain/v3/bin/python3"
         fi
     fi
     if [ -z "$PYTHON" ]; then
-        echo "Cannot run pre-commit without python3.10+ installed!"
+        echo "Cannot run pre-commit without python3.9+ installed!"
         exit 1
     fi
     echo "$PYTHON"
 }
 
-# Function that returns success if the provided Python binary is version 3.10 or later
+# Function that returns success if the provided Python binary is version 3.9 or later
 # Usage:
-# is_python_310 /path/to/python
+# is_python_39 /path/to/python
 # * param1: Python binary
-is_python_310() {
+is_python_39() {
     if [ -z "$1" ]; then
         return 1
     elif $1 -c "import sys; exit(sys.version_info[:2] < (3, 10))"; then

bindings/python/pyproject.toml

@@ -8,7 +8,7 @@ dynamic = ["version", "dependencies", "optional-dependencies"]
 description = "Python bindings for libmongocrypt"
 readme = "README.rst"
 license = {file="LICENSE"}
-requires-python = ">=3.10"
+requires-python = ">=3.9"
 authors = [
     { name = "Shane Harvey", email = "mongodb-user@googlegroups.com" },
 ]
@@ -31,6 +31,7 @@ classifiers = [
     "Programming Language :: Python :: 3 :: Only",
     "Programming Language :: Python :: Implementation :: CPython",
     "Programming Language :: Python :: Implementation :: PyPy",
+    "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",