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Commit3e44e9a

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bpo-44089: Allow subclassing ofcsv.Error (GH-26008) (GH-26066)
* fix subclass error* Update 2021-05-09-22-52-34.bpo-44089.IoANsN.rst(cherry picked from commit2b458c1)Co-authored-by: Ken Jin <28750310+Fidget-Spinner@users.noreply.github.com>Co-authored-by: Ken Jin <28750310+Fidget-Spinner@users.noreply.github.com>
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‎Lib/test/test_csv.py‎

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@@ -1237,6 +1237,9 @@ def test__all__(self):
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extra= {'__doc__','__version__'}
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support.check__all__(self,csv, ('csv','_csv'),extra=extra)
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deftest_subclassable(self):
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# issue 44089
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classFoo(csv.Error): ...
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if__name__=='__main__':
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unittest.main()
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Allow subclassing ``csv.Error`` in 3.10 (it was allowed in 3.9 and earlier but
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was disallowed in early versions of 3.10).

‎Modules/_csv.c‎

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@@ -1515,7 +1515,7 @@ static PyType_Slot error_slots[] = {
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PyType_Specerror_spec= {
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.name="_csv.Error",
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.flags=Py_TPFLAGS_DEFAULT,
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.flags=Py_TPFLAGS_DEFAULT |Py_TPFLAGS_BASETYPE,
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.slots=error_slots,
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};
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