Users configuring MongoClient from environment variables or .env files currently do it by hand: os.environ.get(...), manual type coercion, no validation. This proposes an optional, typed, validated settings layer built on pydantic-settings, shipped as an opt-in extra so it never becomes a hard dependency for users who don't want pydantic.
New module: pymongo/pydantic_settings.py
Investigated whether Astral's ty type checker's unused-awaitable rule catches
missing await calls that mypy strict misses.
ty isn't a dependency of this repo, but runs with no install step using
uvx ty (v0.0.65 as of 2026-07-29).
PYTHON-5947 extends the command-span support added in PYTHON-5945 (PR #2946) with:
find_one, insert_one, aggregate, etc.), with
command spans nested as children (including one per retry attempt).
Measures the effect of a 1ms proxy delay on find_one latency stability under GIL and no-GIL Python.
--delay-ms 1, localhost:28017
The driver currently duplicates code at every telemetry call site: each event (command started/succeeded/failed, connection pool lifecycle, server selection, heartbeats) has two parallel blocks — one calling _debug_log(...) for structured logging and one calling listeners.publish_*() for APM event publishing. This duplication clutters the codebase and will make adding OpenTelemetry spans in PYTHON-5052 very painful (every call site would need a third block).
The solution is a unified telemetry API where a single call handles all telemetry channels simultaneously. A PoC exists in PR #2720 (command events only) using a context manager pattern.
Constraints:
v1)_registry.py — replace the 65-line hardcoded registry_urls dict with {k: _DATA_REPO_BASE + k for k in registry}meson.build — remove the 31 bundled legacy data files from the wheel_fetchers.py — drop the legacy bundled-file fallback; add a stdlib urllib fallback for when pooch isn't installed; improve error messages; clean up the GitHub URL logicgit rm — remove all binary data files from the repo (no history rewrite)tools/download_data.py — new stdlib-only script for Linux distros to pre-download data and set SKIMAGE_DATADIR
The goal is to compile scikit-image extension modules targeting Python's stable ABI (PEP 384, aka "abi3"), so that a single compiled wheel works across Python 3.12+ without per-version recompilation. This is done via Meson's limited_api keyword argument on py3.extension_module() calls, which:
Py_LIMITED_API=0x030C0000 and injects CYTHON_LIMITED_API for Cython sourcesmodule.abi3.so (Linux/macOS) instead of module.cpython-3XX-...soPrerequisites already met:
>= 1.5.0 required (limited_api available since 1.3.0)
| import ctypes | |
| import ctypes.wintypes as wintypes | |
| # Load the IP Helper library | |
| IPHLPAPI = ctypes.WinDLL('Iphlpapi.dll') | |
| # Based on the following documentation: | |
| # https://learn.microsoft.com/en-us/windows/win32/api/iphlpapi/nf-iphlpapi-getadaptersaddresses | |
| # https://learn.microsoft.com/en-us/windows/win32/api/iptypes/ns-iptypes-ip_adapter_addresses_lh | |
| # https://learn.microsoft.com/en-us/windows/win32/api/iptypes/ns-iptypes-ip_adapter_dns_server_address_xp |
June 12, 2023
Use greenletio to add asyncio support in PyMongo, with minimal changes to existing classes.
The reason that Motor is not "truly asynchronous" is that we have blocking calls in PyMongo that do not enable cooperative multitasking. These include acquiring thread locks and socket i/o. Even if we were to use non-blocking versions of these, the event loop would still be blocked.
The previous proposal required rewriting the entirety of PyMongo to be asyncio-friendly, and gave a small performance hit for synchronous code, especially noticeable for small documents.
| from __future__ import annotations | |
| from bson import ObjectId, Decimal128, Binary | |
| from pandas.api.extensions import ExtensionDtype, ExtensionArray, register_extension_dtype | |
| from pandas._typing import type_t | |
| import pyarrow as pa | |
| from typing import Union, Any | |
| import numpy as np | |
| import pandas as pd | |
| import numbers |