René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Python handling of C# collection","articleBody":"### Environment\r\n\r\n-   Pythonnet version: master/3.0\r\n-   Python version: *\r\n-   Operating System: *\r\n-   .NET Runtime: *\r\n\r\n### Details\r\n\r\n-   Describe what you were trying to get done.\r\n\r\nSeems that since `CollectionMixinsProvider` was added this case started failing (`if key in collection.Keys:`), not sure why `CollectionMixinsProvider` is required, if this is a bug or not.. \r\nTest passes commenting out https://github.com/pythonnet/pythonnet/blob/master/src/runtime/InteropConfiguration.cs#L24\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\n```csharp\r\n    class ATests\r\n    {\r\n        private static dynamic containsTest;\r\n        private static string testModule = @\"\r\nfrom clr import AddReference\r\nAddReference(\"\"System\"\")\r\nAddReference(\"\"Python.EmbeddingTest\"\")\r\n\r\ndef ContainsTest(key, collection):\r\n    if key in collection.Keys:\r\n        return True\r\n    return False\r\n\";\r\n\r\n        [OneTimeSetUp]\r\n        public void Setup()\r\n        {\r\n            PythonEngine.Initialize();\r\n            var pyModule = PyModule.FromString(\"module\", testModule);\r\n            containsTest = pyModule.GetAttr(\"ContainsTest\");\r\n        }\r\n\r\n        [TestCase(\"AAPL\", false)]\r\n        [TestCase(\"SPY\", true)]\r\n        public void ContainsTest(string key, bool expected)\r\n        {\r\n            var dic = new Dictionary\u003cstring, object\u003e { { \"SPY\", new object() } };\r\n            Assert.AreEqual(expected, (bool)containsTest(key, dic));\r\n        }\r\n    }\r\n```","author":{"url":"https://github.com/Martin-Molinero","@type":"Person","name":"Martin-Molinero"},"datePublished":"2022-05-06T19:12:00.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/1785/pythonnet/issues/1785"}