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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Error when exposing a python method to .Net in python 2.","articleBody":"### Environment\r\n\r\n-   Pythonnet version: 2.3.0\r\n-   Python version: 2.7.13\r\n-   Operating System: Windows 10\r\n\r\n### Details\r\n\r\nWe are trying to expose a python method in .Net, in a class that inherits from System.Object.\r\n\r\nWe are following the example code in clr.py in the pythonnet repository except that we are inheriting from System.Object and that we are using a namespace. When we run\r\n\r\n```python\r\nclass X(System.Object):\r\n    __namespace__ = \"PyTest\"\r\n    @clrmethod(int, [str])\r\n    def test(self, x):\r\n        return len(x)\r\n```\r\nwe get the error message\r\n\r\nTraceback (most recent call last):\r\n  File \"test.py\", line 80, in \u003cmodule\u003e\r\n    class X(System.Object):\r\nTypeError: Error when calling the metaclass bases\r\n    Unable to find an entry point named 'PyIter_Check' in DLL 'python27'.\r\n\r\nThe error seems to be due to the fact that PyIter_Check is a #define statement and not a function in python. Therefore the import of the function fails in runtime.cs. The error does not occur in python 3 because PyIter_Check is not imported when python 3 is used.\r\n\r\n","author":{"url":"https://github.com/klasma","@type":"Person","name":"klasma"},"datePublished":"2017-06-14T14:15:34.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":9},"url":"https://github.com/492/pythonnet/issues/492"}