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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Cannot inherit interfaces that inherit from interfaces with methods","articleBody":"### Environment\r\n\r\n-   Pythonnet version: 3.0.4\r\n-   Python version: 3.8.10\r\n-   Operating System: Ubuntu 2020.04\r\n-   .NET Runtime: Mono JIT compiler version 6.8.0.105 (Debian 6.8.0.105+dfsg-2 Wed Feb 26 23:23:50 UTC 2020)\r\n\r\n### Details\r\n\r\nPython classes cannot inherit from C# interfaces that themselves inherit from C# interfaces with methods:\r\n\r\n```cs\r\nnamespace A\r\n{\r\n    public interface B\r\n    {\r\n        void C();\r\n    }\r\n\r\n    public interface D : B\r\n    {\r\n    }\r\n}\r\n```\r\n\r\n```python\r\nimport clr\r\n\r\nclr.AddReference('A')\r\nimport A\r\n\r\nclass E(A.D):\r\n    __namespace__ = 'F'\r\n```\r\n\r\nOutput:\r\n\r\n```\r\nTraceback (most recent call last):\r\n  File \"\u003cstdin\u003e\", line 6, in \u003cmodule\u003e\r\nTypeError: Failed to create Python type for F.E\r\n```\r\n\r\nExtending from `B` works. It also works if `C` is removed from `B`.\r\n\r\nPossibly related to #2511. Reverting to 3.0.3 (before 9ebfbde3) provides the moderately-more-useful error `TypeError: VTable setup of type F.E failed`.","author":{"url":"https://github.com/sean-anderson-seco","@type":"Person","name":"sean-anderson-seco"},"datePublished":"2024-12-06T23:25:36.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/2524/pythonnet/issues/2524"}