PYTHON-6138 Address review: raise remaining 3.10 pins, drop stale boto3 constraint

Author: aclark4life

.evergreen/generated_configs/tasks.yml

@@ -2725,13 +2725,13 @@ tasks:
         vars:
           VERSION: v8.0-perf
           SSL: ssl
-          UV_PYTHON: 3.10.11
+          UV_PYTHON: 3.11.9
           UV_PYTHON_PREFERENCE: only-managed
       - func: run tests
         vars:
           TEST_NAME: perf
           SUB_TEST_NAME: sync
-          UV_PYTHON: 3.10.11
+          UV_PYTHON: 3.11.9
           UV_PYTHON_PREFERENCE: only-managed
       - func: attach benchmark test results
       - func: send dashboard data
@@ -2742,13 +2742,13 @@ tasks:
         vars:
           VERSION: v8.0-perf
           SSL: ssl
-          UV_PYTHON: 3.10.11
+          UV_PYTHON: 3.11.9
           UV_PYTHON_PREFERENCE: only-managed
       - func: run tests
         vars:
           TEST_NAME: perf
           SUB_TEST_NAME: async
-          UV_PYTHON: 3.10.11
+          UV_PYTHON: 3.11.9
           UV_PYTHON_PREFERENCE: only-managed
       - func: attach benchmark test results
       - func: send dashboard data
@@ -2759,13 +2759,13 @@ tasks:
         vars:
           VERSION: v8.0-perf
           SSL: nossl
-          UV_PYTHON: 3.10.11
+          UV_PYTHON: 3.11.9
           UV_PYTHON_PREFERENCE: only-managed
       - func: run tests
         vars:
           TEST_NAME: perf
           SUB_TEST_NAME: sync
-          UV_PYTHON: 3.10.11
+          UV_PYTHON: 3.11.9
           UV_PYTHON_PREFERENCE: only-managed
       - func: attach benchmark test results
       - func: send dashboard data
@@ -2776,13 +2776,13 @@ tasks:
         vars:
           VERSION: v8.0-perf
           SSL: nossl
-          UV_PYTHON: 3.10.11
+          UV_PYTHON: 3.11.9
           UV_PYTHON_PREFERENCE: only-managed
       - func: run tests
         vars:
           TEST_NAME: perf
           SUB_TEST_NAME: async
-          UV_PYTHON: 3.10.11
+          UV_PYTHON: 3.11.9
           UV_PYTHON_PREFERENCE: only-managed
       - func: attach benchmark test results
       - func: send dashboard data

.evergreen/scripts/setup-uv-python.sh

@@ -2,7 +2,7 @@
 # Choose the Python that uv uses, and make sure uv can provide it.
 #
 # Input:
-#   UV_PYTHON - a version ("3.10", "3.14t"), an implementation ("pypy3.11"),
+#   UV_PYTHON - a version ("3.11", "3.14t"), an implementation ("pypy3.11"),
 #               or an interpreter path ("/usr/bin/python3.11").
 #
 # Exports:
@@ -11,7 +11,7 @@
 #   UV_PYTHON_PREFERENCE  - "system" so the toolchain wins over managed installs.
 #                           A preference set by the task is left alone.
 #   UV_PYTHON             - the Python interpreter uv uses; defaults to CPython
-#                           3.10 when the task does not set one.
+#                           3.11 when the task does not set one.
 set -euo pipefail
 
 HERE=$(dirname "${BASH_SOURCE:-$0}")
@@ -46,9 +46,9 @@ fi
 # Default to a known-good Python so behavior is deterministic when a task does
 # not pin one. Selecting the uv binary is separate and driven by the required
 # uv version in pyproject.toml.
-export UV_PYTHON="${UV_PYTHON:-3.10}"
+export UV_PYTHON="${UV_PYTHON:-3.11}"
 
-# Print the Python toolchain bin dir for a version like "3.10" or "3.14t".
+# Print the Python toolchain bin dir for a version like "3.11" or "3.14t".
 function _toolchain_dir() {
   local version="$1" dir
   # Only plain CPython versions live in the toolchain.

.evergreen/scripts/utils.py

@@ -86,7 +86,7 @@ class Distro:
 EXTRA_TESTS = ["aws_lambda", "doctest"]
 
 # The managed Python version used for perf tests (PYTHON-6135).
-PERF_PYTHON_VERSION = "3.10.11"
+PERF_PYTHON_VERSION = "3.11.9"
 
 # Tests that do not use run-mongodb directly.
 NO_RUN_ORCHESTRATION = [

CONTRIBUTING.md

@@ -16,7 +16,7 @@ be of interest or that has already been addressed.
 
 ## Supported Interpreters
 
-PyMongo supports CPython 3.9+ and PyPy3.9+. Language features not
+PyMongo supports CPython 3.11+ and PyPy 3.11+. Language features not
 supported by all interpreters can not be used.
 
 ## Style Guide

pyproject.toml

@@ -54,12 +54,6 @@ required-version = "==0.12.12"
 # Skip dependency releases newer than 7 days. Defining it here keeps every uv
 # invocation on the same cutoff.
 exclude-newer = "7 days"
-# boto3 dropped Python 3.9 support in 1.43, so the universal lock forks at
-# 3.10. Without a floor the pre-3.10 fork back-solves to boto3 1.7.84 (2018),
-# whose vendored six and invalid escape sequences break test collection. No
-# AWS task runs on pre-3.10 interpreters; this keeps both forks on current
-# releases.
-constraint-dependencies = ["boto3>=1.34"]
 
 [dependency-groups]
 dev = []