Python 3.8 #1138
Python 3.8 #1138
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The actual problem to fix is this (from https://docs.python.org/3/reference/datamodel.html#creating-the-class-object):
I'll look into it tomorrow. |
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If `PyCell_Set` is not called with a cell it will raise an exception, which is perfectly valid here.
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Okay, so one bug left to fix: On Linux with .NET Core and Python 3.8 some of the embedding tests fail, will have a look. |
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@lostmsu Tests are now passing for all cases as far as I can see, can you have a look? I'll update the Changelog and then this is good to go. |
Codecov Report
@@ Coverage Diff @@
## master #1138 +/- ##
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Coverage 86.66% 86.66%
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Files 1 1
Lines 300 300
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Hits 260 260
Misses 40 40
Continue to review full report at Codecov.
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- Use `BorrowedReference` where applicable - Readd `OperatingSystemName` and `MachineName` for now
src/runtime/typemanager.cs
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| // Update the __classcell__ if it exists | ||
| IntPtr cell = Runtime.PyDict_GetItemString(cls_dict, "__classcell__"); | ||
| if (cell != IntPtr.Zero) | ||
| { | ||
| Runtime.PyCell_Set(cell, py_type); | ||
| Runtime.PyDict_DelItemString(cls_dict, "__classcell__"); | ||
| } | ||
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@filmor I can't find a test, that would cover this scenario, and I suspect there might be a problem with reference counting: if __classcell__ is present, its content is a PyType*, which might need to be DecRefed before being replaced with py_type, and py_type might need to be IncRefed before being put into the cell.
Also, I don't understand why __classcell__ is removed later. If it is removed, what is the purpose of updating its value?
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NVM, I found the code to be replica of https://github.com/python/cpython/blob/145bf269df3530176f6ebeab1324890ef7070bf8/Objects/typeobject.c#L2844
Adds Python 3.8 to the CI and fixes the remaining issue by assigning
__classcell__the created class if it exists. This is required as for the case of subclassing a C# class in Python, we (currently) don't initialise the type viatype_new(== PyType_Type.tp_new) but instead generate it manually. The added code is done at the end oftype_newand is required from Python 3.8 onwards (see command below).