https://github.com/python/cpython/commit/b3e4a3462f6011cacdfc58c565c69e4d7de6b9cd commit: b3e4a3462f6011cacdfc58c565c69e4d7de6b9cd branch: main author: Łukasz Langa <[email protected]> committer: ambv <[email protected]> date: 2026-01-07T16:30:58+01:00 summary:
gh-138568: Make `help` mode in PyREPL not exit on empty line input (#143512) Signed-off-by: yihong0618 <[email protected]> Co-authored-by: yihong0618 <[email protected]> files: A Misc/NEWS.d/next/Core_and_Builtins/2025-09-06-08-29-08.gh-issue-138568.iZlalC.rst M Lib/pydoc.py M Lib/test/test_pydoc/test_pydoc.py diff --git a/Lib/pydoc.py b/Lib/pydoc.py index f3b44c9b3a620a..69c83e085113c9 100644 --- a/Lib/pydoc.py +++ b/Lib/pydoc.py @@ -2004,10 +2004,11 @@ def interact(self): while True: try: request = self.getline('help> ') - if not request: break except (KeyboardInterrupt, EOFError): break request = request.strip() + if not request: + continue # back to the prompt # Make sure significant trailing quoting marks of literals don't # get deleted while cleaning input diff --git a/Lib/test/test_pydoc/test_pydoc.py b/Lib/test/test_pydoc/test_pydoc.py index 3e12a2a96fa381..0e113006cfa156 100644 --- a/Lib/test/test_pydoc/test_pydoc.py +++ b/Lib/test/test_pydoc/test_pydoc.py @@ -2147,10 +2147,47 @@ def test_url_requests(self): class TestHelper(unittest.TestCase): + def mock_interactive_session(self, inputs): + """ + Given a list of inputs, run an interactive help session. Returns a string + of what would be shown on screen. + """ + input_iter = iter(inputs) + + def mock_getline(prompt): + output.write(prompt) + next_input = next(input_iter) + output.write(next_input + os.linesep) + return next_input + + with captured_stdout() as output: + helper = pydoc.Helper(output=output) + with unittest.mock.patch.object(helper, "getline", mock_getline): + helper.interact() + + # handle different line endings across platforms consistently + return output.getvalue().strip().splitlines(keepends=False) + def test_keywords(self): self.assertEqual(sorted(pydoc.Helper.keywords), sorted(keyword.kwlist)) + def test_interact_empty_line_continues(self): + # gh-138568: test pressing Enter without input should continue in help session + self.assertEqual( + self.mock_interactive_session(["", " ", "quit"]), + ["help> ", "help> ", "help> quit"], + ) + + def test_interact_quit_commands_exit(self): + quit_commands = ["quit", "q", "exit"] + for quit_cmd in quit_commands: + with self.subTest(quit_command=quit_cmd): + self.assertEqual( + self.mock_interactive_session([quit_cmd]), + [f"help> {quit_cmd}"], + ) + class PydocWithMetaClasses(unittest.TestCase): def tearDown(self): diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2025-09-06-08-29-08.gh-issue-138568.iZlalC.rst b/Misc/NEWS.d/next/Core_and_Builtins/2025-09-06-08-29-08.gh-issue-138568.iZlalC.rst new file mode 100644 index 00000000000000..8a916310259c78 --- /dev/null +++ b/Misc/NEWS.d/next/Core_and_Builtins/2025-09-06-08-29-08.gh-issue-138568.iZlalC.rst @@ -0,0 +1,2 @@ +Adjusted the built-in :func:`help` function so that empty inputs are ignored in +interactive mode. _______________________________________________ Python-checkins mailing list -- [email protected] To unsubscribe send an email to [email protected] https://mail.python.org/mailman3//lists/python-checkins.python.org Member address: [email protected]
