René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"KeyboardInterrupt about test for REPL was directly captured by the test program","articleBody":"# Bug report\r\n\r\n### Bug description:\r\n\r\nWhen I was writing test for PR #128467\r\n\r\n```python\r\n# under class TestPyReplCompleter(line ≈ 806) Lib/test/test_pyrepl/test_pyrepl.py\r\n    def test_completion_menu_cleared_after_KeyboardInterrupt(self):\r\n        events = itertools.chain(\r\n            code_to_events(\"int.\"),\r\n            [\r\n                Event(evt=\"key\", data=\"\\t\", raw=bytearray(b\"\\t\")),\r\n                Event(evt=\"key\", data=\"\\t\", raw=bytearray(b\"\\t\")),\r\n                Event(evt=\"key\", data=\"\\x03\", raw=bytearray(b\"\\x03\")),  # Ctrl+C\r\n            ],\r\n        )\r\n\r\n        namespace = {}\r\n        reader = self.prepare_reader(events, namespace)\r\n        output = multiline_input(reader, namespace)\r\n\r\n        self.assertEqual(clean_screen(reader.screen), \"int.\") # asser condition isn't good now\r\n\r\n```\r\n\r\nI found the `KeyboardInterrupt` caused by `Event(evt=\"key\", data=\"\\x03\", raw=bytearray(b\"\\x03\"))` will be directly captured by the test program itself\r\n\r\n``````powershell\r\n# result of \".\\python.bat -m test test_pyrepl.test_pyrepl -v\"\r\n== Tests result: INTERRUPTED ==\r\n\r\n1 test omitted:\r\n    test_pyrepl.test_pyrepl\r\n\r\nTest suite interrupted by signal SIGINT.\r\n\r\nTotal duration: 1.3 sec\r\nTotal tests: run=0\r\nTotal test files: run=0/1\r\nResult: INTERRUPTED\r\n``````\r\n\r\nSo I added a traceback in the test function\r\n\r\n``````python\r\n    def test_completion_menu_cleared_after_KeyboardInterrupt(self):\r\n        events = itertools.chain(\r\n            code_to_events(\"int.\"),\r\n            [\r\n                Event(evt=\"key\", data=\"\\t\", raw=bytearray(b\"\\t\")),\r\n                Event(evt=\"key\", data=\"\\t\", raw=bytearray(b\"\\t\")),\r\n                Event(evt=\"key\", data=\"\\x03\", raw=bytearray(b\"\\x03\")),  # Ctrl+C\r\n            ],\r\n        )\r\n\r\n        namespace = {}\r\n        reader = self.prepare_reader(events, namespace)\r\n\r\n        try:\r\n            output = multiline_input(reader, namespace)\r\n        except KeyboardInterrupt:\r\n            traceback.print_exc()\r\n\r\n        self.assertEqual(clean_screen(reader.screen), \"int.\")\r\n\r\n``````\r\n\r\nI also added `traceback.print_exc()` in `Lib/_pyrepl/simple_interact.py(line ≈ 164)`(the user-facing REPL)\r\n\r\n```python\r\n        except KeyboardInterrupt:\r\n            traceback.print_exc() # here\r\n            r = _get_reader()\r\n            if r.input_trans is r.isearch_trans:\r\n                r.do_cmd((\"isearch-end\", [\"\"]))\r\n            if r.cmpltn_menu_choices:\r\n                r.cmpltn_reset()\r\n            r.pos = len(r.get_unicode())\r\n            r.dirty = True\r\n            r.refresh()\r\n            r.in_bracketed_paste = False\r\n            console.write(\"\\nKeyboardInterrupt\\n\")\r\n            console.resetbuffer()\r\n```\r\n\r\nrecompile and run\r\n\r\n```python\r\nPython 3.14.0a3+ (heads/clean_suggestion-dirty:9801a103467, Jan  9 2025, 14:45:54) [MSC v.1942 64 bit (AMD64)] on win32\r\nType \"help\", \"copyright\", \"credits\" or \"license\" for more information.\r\n\u003e\u003e\u003e Traceback (most recent call last):\r\n  File \"E:\\0000__Python_Project\\00__cpython\\Lib\\_pyrepl\\simple_interact.py\", line 151, in run_multiline_interactive_console\r\n    statement = multiline_input(more_lines, ps1, ps2)\r\n  File \"E:\\0000__Python_Project\\00__cpython\\Lib\\_pyrepl\\readline.py\", line 389, in multiline_input\r\n    return reader.readline()\r\n           ~~~~~~~~~~~~~~~^^\r\n  File \"E:\\0000__Python_Project\\00__cpython\\Lib\\_pyrepl\\reader.py\", line 801, in readline\r\n    self.handle1()\r\n    ~~~~~~~~~~~~^^\r\n  File \"E:\\0000__Python_Project\\00__cpython\\Lib\\_pyrepl\\reader.py\", line 756, in handle1\r\n    self.console.wait(100)\r\n    ~~~~~~~~~~~~~~~~~^^^^^\r\n  File \"E:\\0000__Python_Project\\00__cpython\\Lib\\_pyrepl\\windows_console.py\", line 486, in wait\r\n    time.sleep(0.01)\r\n    ~~~~~~~~~~^^^^^^\r\nKeyboardInterrupt\r\n\r\nKeyboardInterrupt\r\n\u003e\u003e\u003e\r\n```\r\n\r\nAt the same time, the related error in the test is\r\n\r\n```python\r\nFile \"E:\\0000__Python_Project\\00__cpython\\Lib\\test\\test_pyrepl\\test_pyrepl.py\", line 864, in test_completion_menu_cleared_after_KeyboardInterrupt\r\n    output = multiline_input(reader, namespace)\r\n  File \"E:\\0000__Python_Project\\00__cpython\\Lib\\test\\test_pyrepl\\support.py\", line 18, in multiline_input\r\n    return reader.readline()\r\n           ~~~~~~~~~~~~~~~^^\r\n  File \"E:\\0000__Python_Project\\00__cpython\\Lib\\_pyrepl\\reader.py\", line 801, in readline\r\n    self.handle1()\r\n    ~~~~~~~~~~~~^^\r\n  File \"E:\\0000__Python_Project\\00__cpython\\Lib\\_pyrepl\\reader.py\", line 784, in handle1\r\n    self.do_cmd(cmd)\r\n    ~~~~~~~~~~~^^^^^\r\n  File \"E:\\0000__Python_Project\\00__cpython\\Lib\\_pyrepl\\reader.py\", line 709, in do_cmd\r\n    command.do()\r\n    ~~~~~~~~~~^^\r\n  File \"E:\\0000__Python_Project\\00__cpython\\Lib\\_pyrepl\\commands.py\", line 227, in do\r\n    raise KeyboardInterrupt\r\nKeyboardInterrupt\r\nFAIL\r\n\r\n# something...\r\n\r\n======================================================================\r\nFAIL: test_completion_menu_cleared_after_KeyboardInterrupt (test.test_pyrepl.test_pyrepl.TestPyReplCompleter.test_completion_menu_cleared_after_KeyboardInterrupt)\r\n----------------------------------------------------------------------\r\nTraceback (most recent call last):\r\n  File \"E:\\0000__Python_Project\\00__cpython\\Lib\\test\\test_pyrepl\\test_pyrepl.py\", line 868, in test_completion_menu_cleared_after_KeyboardInterrupt\r\n    self.assertEqual(clean_screen(reader.screen), \"int.\")\r\n    ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\r\nAssertionError: 'int.as_integer_ratio(  int.denominator       [259 chars]int.' != 'int.'\r\n+ int.\r\n- int.as_integer_ratio(  int.denominator        int.mro()\r\n- int.bit_count(         int.from_bytes(        int.numerator\r\n- int.bit_length(        int.imag               int.real\r\n- int.conjugate(         int.is_integer(        int.to_bytes(\r\n- \u003e\u003e\u003eint.\r\n\r\n\r\n----------------------------------------------------------------------\r\n\r\n```\r\n\r\nSo the `KeyboardInterrupt` in test did not behave correctly as if the user pressed `Ctrl+C`, but was directly captured by the test program\r\n\r\n\r\n### CPython versions tested on:\r\n\r\nCPython main branch\r\n\r\n### Operating systems tested on:\r\n\r\nWindows","author":{"url":"https://github.com/Natural-selection1","@type":"Person","name":"Natural-selection1"},"datePublished":"2025-01-09T13:11:39.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":3},"url":"https://github.com/128676/cpython/issues/128676"}