René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Add a class to manage the context of a interaction with Python and simplify the variable exchanging","articleBody":"\"eval\" and \"exec\" are the most frequently used methods when interacting with Python.  However, this two methods implemented [here](https://github.com/pythonnet/pythonnet/pull/389) are hard to use because maintain the global variable dictionary and local variable dictionary is a tedious and repeated work.\r\n\r\nThe nature of the problem lies in the variable exchanging between .NET and Python.\r\n\r\nI think a scope class can be added to manage the context of a interaction with Python and simplify the variable exchanging.\r\nA Scope should act like a Python Module in .NET. In the Scope class, many python functions can be wrapped to operate with the locals and globals for easy-to-use and speeding up. \r\n\r\nFor example, the eval example provided in that PR,\r\n```\r\ndynamic sys = Py.Import(\"sys\");\r\nsys.attr1 = 100;\r\nPyDict locals = new PyDict();\r\nlocals.SetItem(\"sys\", sys);\r\nlocals.SetItem(\"a\", new PyInt(10));\r\n \r\nPythonEngine.Exec(\"c = sys.attr1 + a + 1\", null, locals.Handle);\r\nvar c = locals.GetItem(\"c\").AsManagedObject(typeof(Int32));\r\n\r\nConsole.WriteLine(\"c= {0}\", c);\r\n```\r\n\r\ncan be written as,\r\n\r\n```\r\nvar ps = Py.Session('test')\r\nsys = ps.Import(\"sys\");\r\nsys.attr1 = 100;\r\nps.SetLocal(\"a\", 10);\r\nps.Exec(\"c = sys.attr1 + a + 1\");   //pass\r\nvar c = ps.Get\u003cSystem.Int32\u003e(\"c\");  //get the local variable and convert it to .NET type.\r\n\r\nps.Dispose(); \r\nor\r\nps.Suspend(); //use it later. Py.Session('test') will return it.\r\n```\r\n\r\nI implement a prototype of this proposal [here](https://github.com/pythonnet/pythonnet/pull/381) to help discussion.\r\n","author":{"url":"https://github.com/yagweb","@type":"Person","name":"yagweb"},"datePublished":"2017-02-15T16:35:57.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":3},"url":"https://github.com/380/pythonnet/issues/380"}