René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Exception thrown when initializing Python .NET after a domain unload","articleBody":"### Environment\r\n\r\n-   Pythonnet version: latest master commit as of 2018-08-09 (fb84cd28254f1ed6bde82766dadd6ba18c3e7be1 )\r\n\r\n-   Python version: \r\nPython 2.7.15 (v2.7.15:ca079a3ea3, Apr 30 2018, 16:30:26) [MSC v.1500 64 bit (AMD64)] on win32\r\n\r\n-   Operating System:\r\nWindows 10\r\n\r\n- In the context of running in Unity, but also reproducible in a simple standalone app made from scratch\r\n\r\n### Details\r\n\r\nUnity, whenever a C# script is changed, the AppDomain in which the Assemblies are loaded gets unloaded. Then, Unity creates a fresh AppDomain, recompiles the C# assemblies and loads them again.\r\n\r\nThe Python.Runtime assembly gets unloaded, but the Python interpreter survives (it is a native library). This results in an inconsistent state between the Python .NET Engine/Runtime classes (which are not initialized) and the Python interpreter (which is initialized). \r\n\r\nAn exception is raised when Python .NET accesses the interpreter (System.AppDomainUnloadedException: Attempted to access an unloaded AppDomain.)\r\n\r\n-   Describe what you were trying to get done.\r\n\r\nSee above\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\nI will attach my standalone application which reproduces this crash along with the repro steps. (either ere or on the pull request if I cannot attach here)","author":{"url":"https://github.com/lassond","@type":"Person","name":"lassond"},"datePublished":"2018-08-09T18:39:21.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":5},"url":"https://github.com/714/pythonnet/issues/714"}