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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Can not call inherited method on nested class, when another nested class inherits from it and defines an override.","articleBody":"This is a very specific setup with classes and inheritance, but is exactly what happened to us and where pythonnet does not do the right thing.\r\n\r\nIt is closely related to #1420 but a slightly different configuration.\r\n\r\nHere is code to reproduce the issue:\r\n\r\n```cs\r\nnamespace pythonnet_testing {\r\n  public class Creator {\r\n    public static object CreateObject() =\u003e\r\n      new BaseClass.NestedClass();\r\n  }\r\n\r\n  public class BaseClass {\r\n\r\n\r\n    public virtual string GetSignal() =\u003e\r\n      \"hello\";\r\n\r\n    public class NestedClass : BaseClass {\r\n      // NOTE: This is using the default `GetSignal` implementation\r\n    }\r\n\r\n    // NOTE: This class inherits from the nested class, and overrides the method in the base class\r\n    // When this class is defined, we can no longer call `GetSignal` on instances of `NestedClass`\r\n    // ==\u003e `Unhandled exception. Python.Runtime.PythonException: 'NestedClass' object has no attribute 'GetSignal'`\r\n    public class InheritFromNested : BaseClass.NestedClass {\r\n      public override string GetSignal() =\u003e\r\n        \"override\";\r\n    }\r\n  }\r\n\r\n\r\n  class Program {\r\n    static void Main(string[] args) {\r\n      var pyCode = @\"\r\nimport pythonnet_testing\r\no = pythonnet_testing.Creator.CreateObject()\r\nprint(f'Method call: {o.GetSignal()}')\r\n      \";\r\n      Runtime.PythonDLL = \"libpython3.9.dylib\";\r\n      PythonEngine.Initialize();\r\n\r\n      using (Py.GIL()) {\r\n        PythonEngine.Exec(pyCode);\r\n      }\r\n\r\n      PythonEngine.Shutdown();\r\n    }\r\n  }\r\n}\r\n```\r\n\r\nNOTE: If I remove the `InheritFromNested` class, then the call to `o.GetSignal` will resolve the proper inherited virtual base method.","author":{"url":"https://github.com/Algoryx-NilsHjelte","@type":"Person","name":"Algoryx-NilsHjelte"},"datePublished":"2022-05-09T12:01:14.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/1787/pythonnet/issues/1787"}