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gh-145238: Add native thread ID to logging record attributes #145655

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6 changes: 6 additions & 0 deletions Doc/library/logging.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -1062,6 +1062,9 @@ the options available to you.
| | | of the logging call which resulted in the |
| | | creation of this record. |
+----------------+-------------------------+-----------------------------------------------+
| nativeThreadId | ``%(nativeThreadId)d`` | Native thread ID (if available). See |
| | | :func:`threading.get_native_id`. |
+----------------+-------------------------+-----------------------------------------------+
| thread | ``%(thread)d`` | Thread ID (if available). |
+----------------+-------------------------+-----------------------------------------------+
| threadName | ``%(threadName)s`` | Thread name (if available). |
Expand All @@ -1075,6 +1078,9 @@ the options available to you.
.. versionchanged:: 3.12
*taskName* was added.

.. versionchanged:: 3.15
*nativeThreadId* was added.

.. _logger-adapter:

LoggerAdapter Objects
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5 changes: 5 additions & 0 deletions Lib/logging/__init__.py
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Expand Up @@ -350,9 +350,14 @@ def __init__(self, name, level, pathname, lineno,
if logThreads:
self.thread = threading.get_ident()
self.threadName = threading.current_thread().name
if threading._HAVE_THREAD_NATIVE_ID:
self.nativeThreadId = threading.get_native_id()
else: # pragma: no cover
self.nativeThreadId = None
else: # pragma: no cover
self.thread = None
self.threadName = None
self.nativeThreadId = None
if not logMultiprocessing: # pragma: no cover
self.processName = None
else:
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3 changes: 3 additions & 0 deletions Misc/NEWS.d/next/Library/2026-03-08-00-00-00.gh-issue-145238.nThrId.rst
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@@ -0,0 +1,3 @@
Added ``nativeThreadId`` attribute to :class:`logging.LogRecord`, exposing
the OS-native thread ID via :func:`threading.get_native_id`. This can be
used in format strings as ``%(nativeThreadId)d``.
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