tblib

• Changed tblib.pickling_support.install to support exceptions with __init__ that does match the default BaseException.__reduce__ (as it expects the positional arguments to __init__ to match the args attribute).

  Special handling for OSError (and subclasses) is also included. The errno, strerror, winerror, filename and filename2 attributes will be added in the reduce structure (if set).

  This will support exception subclasses that do this without defining a custom __reduce__:

  def __init__(self):
      super().__init__('mistery argument')
  
  def __init__(self, mistery_argument):
      super().__init__()
      self.mistery_argument = mistery_argument

  Tests and POC contributed by Oldřich Jedlička in #73.

• Fixed some doctest and coverage config. Contributed by Colin Watson in #79.

• Improved performance of as_traceback by a large factor. Contributed by Haoyu Weng in #81.

• Dropped support for now-EOL Python 3.8 and added 3.13 in the test grid.

• Added support for __context__, __suppress_context__ and __notes__. Contributed by Tim Maxwell in #72.

• Added the get_locals argument to tblib.pickling_support.install(), tblib.Traceback and tblib.Frame. Fixes #41.

• Dropped support for now-EOL Python 3.7 and added 3.12 in the test grid.

• Removed support for legacy Pythons (2.7 and 3.6) and added Python 3.11 in the test grid.

• Some cleanups and refactors (mostly from ruff).

• Add more attributes to Frame and Code objects for pytest compatibility. Contributed by Ivanq in #58.

• When pickling an Exception, also pickle its traceback and the Exception chain (raise ... from ...). Contributed by Guido Imperiale in #53.

• Added support for Python 3.8. Contributed by Victor Stinner in #42.

• Removed support for end of life Python 3.4.

• Few CI improvements and fixes.

• Removed support for end of life Python 3.3.

• Fixed tests for Python 3.7. Contributed by Elliott Sales de Andrade in #36.

• Fixed compatibility issue with Twised (twisted.python.failure.Failure expected a co_code attribute).

Added to_dict method and from_dict classmethod on Tracebacks. Contributed by beckjake in #5 .

On this page

• Changelog

• 3.2.2 (2025-11-12)

• 3.2.1 (2025-10-31)

• 3.2.0 (2025-10-21)

• 3.1.0 (2025-03-31)

• 3.0.0 (2023-10-22)

• 2.0.0 (2023-06-22)

• 1.7.0 (2020-07-24)

• 1.6.0 (2019-12-07)

• 1.5.0 (2019-10-23)

• 1.4.0 (2019-05-02)

• 1.3.2 (2017-04-09)

• 1.3.1 (2017-03-27)

• 1.3.0 (2016-03-08)

• 1.2.0 (2015-12-18)

• 1.1.0 (2015-07-27)

• 1.0.0 (2015-03-30)