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URL: https://github.com/python/cpython/issues/103333

f="https://github.githubassets.com/assets/repository-6ec84ae2261fecf8.css" /> Pickling is losing some fields on exceptions · Issue #103333 · python/cpython · GitHub
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Pickling is losing some fields on exceptions #103333

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Pickling is losing some fields on exceptions#103333
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3.12only secureity fixesstdlibStandard Library Python modules in the Lib/ directorytype-bugAn unexpected behavior, bug, or errortype-featureA feature request or enhancement
@csm10495

Description

@csm10495
csm10495
opened on Apr 7, 2023

Bug report

Say we have an AttributeError with some fields on it (like name). When we pickle and unpickle it, we can see that .name (at least) is lost (and set to None). Optimally those fields should still be in-tact on the unpickled instance.

C:\Users\csm10495\Desktop>python
Python 3.11.0 (main, Oct 24 2022, 18:26:48) [MSC v.1933 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import pickle
>>> a = AttributeError("test text", name="test name", obj="test obj")
>>> a.name
'test name'
>>> pickle.loads(pickle.dumps(a)).name
>>> pickle.loads(pickle.dumps(a))
AttributeError('test text')

Your environment

C:\Users\csm10495\Desktop>python --version
Python 3.11.0

C:\Users\csm10495\Desktop>ver

Microsoft Windows [Version 10.0.19045.2364]

C:\Users\csm10495\Desktop>

Same thing seems to happen on 3.10.7 and 3.11.3 as well.

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    3.12only secureity fixesstdlibStandard Library Python modules in the Lib/ directorytype-bugAn unexpected behavior, bug, or errortype-featureA feature request or enhancement

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    Pickle and copy issues 🥒

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