René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"C# initialize fails if a class derived from IEnumerable and IEnumerator is in global namespace","articleBody":"### Environment\r\n\r\n-   Pythonnet version: master build from 21/10/14 \r\n-   Python version: tested with WinPython 3.6.6.2, 3.7.0, 3.7.1, 3.8.9\r\n-   Operating System: Windows10 \r\n-   .NET Runtime: v4.7.1 \r\n\r\n### Details\r\n\r\n-   Describe what you were trying to get done.\r\n\r\nI tried to integrate a local python (WinPython) into a Unity application via pythonnet. While this worked for an easy demo project, initialization constantly failed for our production setup:\r\n\r\n\r\n\r\n-   What commands did you run to trigger this issue? If you can provide a\r\n    [Minimal, Complete, and Verifiable example](http://stackoverflow.com/help/mcve)\r\n    this will help us understand the issue.\r\n\r\nCreating a VS 2017/2019 project with the code in global namespace triggers the error (no need to actually use the class somewhere). Commenting out the Test123 class or putting it in a namespace solves the problem.\r\n\r\n```\r\n    public class Test123 : IEnumerator, IEnumerable\r\n    {\r\n        object IEnumerator.Current\r\n        {\r\n            get { return null; }\r\n        }\r\n\r\n        public IEnumerator GetEnumerator()\r\n        {\r\n            return this;\r\n        }\r\n\r\n        public bool MoveNext()\r\n        {\r\n            return true;\r\n        }\r\n\r\n        public void Reset()\r\n        { }\r\n    }\r\n    \r\n     class Program\r\n    {\r\n        static void Main(string[] args)\r\n        {\r\n            Runtime.PythonDLL = @\".\\..\\..\\..\\..\\..\\..\\winpython\\WPy64-3771\\python-3.7.7.amd64\\python37.dll\";\r\n\r\n            var pythonPath = @\".\\..\\..\\..\\..\\..\\..\\winpython\\WPy64-3771\\python-3.7.7.amd64\";\r\n            Environment.SetEnvironmentVariable(\"PATH\", $@\"{pythonPath};\" + Environment.GetEnvironmentVariable(\"PATH\"));\r\n            Environment.SetEnvironmentVariable(\"PYTHONHOME\", pythonPath);\r\n            Environment.SetEnvironmentVariable(\"PYTHONPATH \", $@\"{pythonPath}\\Lib\");\r\n\r\n            PythonEngine.Initialize();\r\n        }\r\n    }\r\n```\r\n\r\n-   If there was a crash, please include the traceback here.\r\n\r\n```\r\nnvalidOperationException: ValueFactory attempted to access the Value property of this instance.\r\nSystem.Lazy`1[T].CreateValue () (at \u003c437ba245d8404784b9fbab9b439ac908\u003e:0)\r\nSystem.Lazy`1[T].LazyInitValue () (at \u003c437ba245d8404784b9fbab9b439ac908\u003e:0)\r\nSystem.Lazy`1[T].get_Value () (at \u003c437ba245d8404784b9fbab9b439ac908\u003e:0)\r\nPython.Runtime.Runtime.get_InteropModule () (at C:/dev/projects/pynet/pythonnet/src/runtime/runtime.cs:574)\r\nPython.Runtime.PythonException.TryDecodePyErr (Python.Runtime.BorrowedReference typeRef, Python.Runtime.BorrowedReference valRef, Python.Runtime.BorrowedReference tbRef) (at C:/dev/projects/pynet/pythonnet/src/runtime/pythonexception.cs:205)\r\nPython.Runtime.PythonException.FetchCurrentOrNull (System.Runtime.ExceptionServices.ExceptionDispatchInfo\u0026 dispatchInfo) (at C:/dev/projects/pynet/pythonnet/src/runtime/pythonexception.cs:105)\r\nPython.Runtime.PythonException.ThrowLastAsClrException () (at C:/dev/projects/pynet/pythonnet/src/runtime/pythonexception.cs:44)\r\nPython.Runtime.PythonException.ThrowIfIsNull (Python.Runtime.BorrowedReference ob) (at C:/dev/projects/pynet/pythonnet/src/runtime/pythonexception.cs:429)\r\nPython.Runtime.PyModule.Import (System.String name) (at C:/dev/projects/pynet/pythonnet/src/runtime/module.cs:75)\r\nPython.Runtime.Runtime+\u003c\u003ec__DisplayClass31_0.\u003cGetModuleLazy\u003eb__0 () (at C:/dev/projects/pynet/pythonnet/src/runtime/runtime.cs:402)\r\nSystem.Lazy`1[T].CreateValue () (at \u003c437ba245d8404784b9fbab9b439ac908\u003e:0)\r\nSystem.Lazy`1[T].LazyInitValue () (at \u003c437ba245d8404784b9fbab9b439ac908\u003e:0)\r\nSystem.Lazy`1[T].get_Value () (at \u003c437ba245d8404784b9fbab9b439ac908\u003e:0)\r\nPython.Runtime.Runtime.get_InteropModule () (at C:/dev/projects/pynet/pythonnet/src/runtime/runtime.cs:574)\r\nPython.Runtime.PythonException.TryDecodePyErr (Python.Runtime.BorrowedReference typeRef, Python.Runtime.BorrowedReference valRef, Python.Runtime.BorrowedReference tbRef) (at C:/dev/projects/pynet/pythonnet/src/runtime/pythonexception.cs:205)\r\nPython.Runtime.PythonException.FetchCurrentOrNull (System.Runtime.ExceptionServices.ExceptionDispatchInfo\u0026 dispatchInfo) (at C:/dev/projects/pynet/pythonnet/src/runtime/pythonexception.cs:105)\r\nPython.Runtime.PythonException.ThrowLastAsClrException () (at C:/dev/projects/pynet/pythonnet/src/runtime/pythonexception.cs:44)\r\nPython.Runtime.PythonException.ThrowIfIsNull (Python.Runtime.BorrowedReference ob) (at C:/dev/projects/pynet/pythonnet/src/runtime/pythonexception.cs:429)\r\nPython.Runtime.PyModule.Import (System.String name) (at C:/dev/projects/pynet/pythonnet/src/runtime/module.cs:75)\r\nPython.Runtime.Py.Import (System.String name) (at C:/dev/projects/pynet/pythonnet/src/runtime/pythonengine.cs:776)\r\nPython.Runtime.InteropConfiguration+\u003c\u003ec.\u003cMakeDefault\u003eb__3_0 () (at C:/dev/projects/pynet/pythonnet/src/runtime/InteropConfiguration.cs:23)\r\nSystem.Lazy`1[T].CreateValue () (at \u003c437ba245d8404784b9fbab9b439ac908\u003e:0)\r\nSystem.Lazy`1[T].LazyInitValue () (at \u003c437ba245d8404784b9fbab9b439ac908\u003e:0)\r\nSystem.Lazy`1[T].get_Value () (at \u003c437ba245d8404784b9fbab9b439ac908\u003e:0)\r\nPython.Runtime.Mixins.CollectionMixinsProvider.get_Mixins () (at C:/dev/projects/pynet/pythonnet/src/runtime/Mixins/CollectionMixinsProvider.cs:15)\r\nPython.Runtime.Mixins.CollectionMixinsProvider.GetBaseTypes (System.Type type, System.Collections.Generic.IList`1[T] existingBases) (at C:/dev/projects/pynet/pythonnet/src/runtime/Mixins/CollectionMixinsProvider.cs:57)\r\nPython.Runtime.PythonBaseTypeProviderGroup.GetBaseTypes (System.Type type, System.Collections.Generic.IList`1[T] existingBases) (at C:/dev/projects/pynet/pythonnet/src/runtime/PythonBaseTypeProviderGroup.cs:18)\r\nPython.Runtime.TypeManager.GetBaseTypeTuple (System.Type clrType) (at C:/dev/projects/pynet/pythonnet/src/runtime/typemanager.cs:443)\r\nPython.Runtime.TypeManager.InitializeClass (System.Type clrType, Python.Runtime.PyType pyType) (at C:/dev/projects/pynet/pythonnet/src/runtime/typemanager.cs:229)\r\nPython.Runtime.TypeManager.GetOrCreateClass (System.Type type) (at C:/dev/projects/pynet/pythonnet/src/runtime/typemanager.cs:158)\r\nPython.Runtime.ClassManager.InitPyType (System.Type type, Python.Runtime.ClassBase impl) (at C:/dev/projects/pynet/pythonnet/src/runtime/classmanager.cs:263)\r\nPython.Runtime.ClassManager.GetClass (System.Type type) (at C:/dev/projects/pynet/pythonnet/src/runtime/classmanager.cs:195)\r\nPython.Runtime.ModuleObject.GetAttribute (System.String name, System.Boolean guess) (at C:/dev/projects/pynet/pythonnet/src/runtime/moduleobject.cs:120)\r\nPython.Runtime.ModuleObject.LoadNames () (at C:/dev/projects/pynet/pythonnet/src/runtime/moduleobject.cs:191)\r\nPython.Runtime.ImportHook.UpdateCLRModuleDict () (at C:/dev/projects/pynet/pythonnet/src/runtime/importhook.cs:218)\r\nPython.Runtime.ImportHook.GetCLRModule () (at C:/dev/projects/pynet/pythonnet/src/runtime/importhook.cs:230)\r\nPython.Runtime.PythonEngine.Initialize (System.Collections.Generic.IEnumerable`1[T] args, System.Boolean setSysArgv, System.Boolean initSigs, Python.Runtime.ShutdownMode mode) (at C:/dev/projects/pynet/pythonnet/src/runtime/pythonengine.cs:223)\r\nPython.Runtime.PythonEngine.Initialize (System.Boolean setSysArgv, System.Boolean initSigs, Python.Runtime.ShutdownMode mode) (at C:/dev/projects/pynet/pythonnet/src/runtime/pythonengine.cs:184)\r\nPython.Runtime.PythonEngine.Initialize () (at C:/dev/projects/pynet/pythonnet/src/runtime/pythonengine.cs:179)\r\nve.vet.Python.PythonIntegration..ctor () (at Assets/Source/ve.vet.Python/PythonIntegration.cs:36)\r\nve.vet.Python.PythonIntegrationExample..ctor () (at Assets/Source/ve.vet.Python/examples/PythonIntegrationExample.cs:25)\r\n```\r\n","author":{"url":"https://github.com/mfrankeTT","@type":"Person","name":"mfrankeTT"},"datePublished":"2021-10-16T15:28:00.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/1601/pythonnet/issues/1601"}