René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"IPythonShellEmbed fails to recognize local variables","articleBody":"# Issue\n\nEmbedded IPython shells can lose track of local variables.\n# Test Case\n\nMinimal test case:\n\n```\nclass Foo(object):\n    \"\"\" Container-like object \"\"\"\n    def __setattr__(self, obj, val):\n        self.__dict__[obj] = val\n\n    def __getattr__(self, obj, val):\n        return self.__dict__[obj]\n\nf = Foo()\nf.indices = set([1,2,3,4,5])\nf.values = {}\nfor x in f.indices:\n    f.values[x] = x\n\ndef bar(foo):\n    import IPython\n    IPython.Shell.IPShellEmbed()()\n    return sum(foo.values[x] for x in foo.indices)\n\nprint bar(f)\n```\n\nTo see the error, first run the code in Python (or IPython) and exit from the spawned shell; the final print statement correctly displays '15'. Run the code again, but this time type `sum(foo.values[x] for x in foo.indices)` in the spawned shell, and we receive the error \n\n\u003e \" NameError: global name 'foo' is not defined\".\n","author":{"url":"https://github.com/prsteel","@type":"Person","name":"prsteel"},"datePublished":"2010-07-19T20:26:34.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":21},"url":"https://github.com/136/ipython/issues/136"}