René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"On current main (after applying PEP 669) the tracing behavior changed and can notify about the same line more than once.","articleBody":"The test case for this is below (it works for Python 3.11 and fails in the current master).\r\n\r\n```\r\nimport sys\r\nimport unittest\r\n\r\n\r\nclass TestSetLocalTrace(unittest.TestCase):\r\n\r\n    def test_with_branches(self):\r\n\r\n        def tracefunc(frame, event, arg):\r\n            if frame.f_code.co_name == \"func\":\r\n                frame.f_trace = None\r\n                frame.f_trace = tracefunc\r\n                line = frame.f_lineno - frame.f_code.co_firstlineno\r\n                events.append((line, event))\r\n            return tracefunc\r\n\r\n        def func(arg=1):\r\n            N = 1\r\n            if arg \u003e= 2:\r\n                not_reached = 3\r\n            else:\r\n                reached = 5\r\n            if arg \u003e= 3:\r\n                not_reached = 7\r\n            else:\r\n                reached = 9\r\n            the_end = 10\r\n\r\n        EXPECTED_EVENTS = [\r\n            (0, 'call'),\r\n            (1, 'line'),\r\n            (2, 'line'),\r\n            (5, 'line'),\r\n            (6, 'line'),\r\n            (9, 'line'),\r\n            (10, 'line'),\r\n            (10, 'return'),\r\n        ]\r\n\r\n        events = []\r\n        sys.settrace(tracefunc)\r\n        sys._getframe().f_trace = tracefunc\r\n        func()\r\n        self.assertEqual(events, EXPECTED_EVENTS)\r\n        sys.settrace(None)\r\n```","author":{"url":"https://github.com/fabioz","@type":"Person","name":"fabioz"},"datePublished":"2023-04-12T12:07:36.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":7},"url":"https://github.com/103471/cpython/issues/103471"}