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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"error running unittest","articleBody":"Running tests using `unittest` from the standard library gives an error about unrecognized arguments. I know this is supposed to be an unmaintained module, but I wonder if IPython already has a standard way of hiding ipython specific args.\r\n\r\nMaybe a little unusual to actually want to run unittest inside a repl, but the standard repl handles this without error.\r\n\r\nA minimal testcase shows the issue:\r\n\r\n```\r\n$ ipython --TerminalIPythonApp.interactive_shell_class=rlipython.TerminalInteractiveShell\r\nPython 3.6.1 (default, Apr  4 2017, 09:40:51)\r\nType 'copyright', 'credits' or 'license' for more information\r\nIPython 6.0.0 -- An enhanced Interactive Python. Type '?' for help.\r\n\r\nIn [1]: import unittest\r\n\r\nIn [2]: class IpythonTest(unittest.TestCase):\r\n   ...:     def test_test(self):\r\n   ...:         self.assertTrue(True)\r\n   ...:\r\n\r\nIn [3]: unittest.main()\r\nusage: ipython [-h] [-v] [-q] [--locals] [-f] [-c] [-b] [tests [tests ...]]\r\nipython: error: unrecognized arguments: --TerminalIPythonApp.interactive_shell_class=rlipython.TerminalInteractiveShell\r\nAn exception has occurred, use %tb to see the full traceback.\r\n\r\nSystemExit: 2\r\n\r\n/usr/local/lib/python3.6/site-packages/IPython/core/interactiveshell.py:2855: UserWarning: To exit: use 'exit', 'quit', or Ctrl-D.\r\n  warn(\"To exit: use 'exit', 'quit', or Ctrl-D.\", stacklevel=1)\r\n\r\nIn [4]: %tb\r\n---------------------------------------------------------------------------\r\nSystemExit                                Traceback (most recent call last)\r\n\u003cipython-input-3-7d361a096586\u003e in \u003cmodule\u003e()\r\n----\u003e 1 unittest.main()\r\n\r\n/usr/local/Cellar/python3/3.6.1/Frameworks/Python.framework/Versions/3.6/lib/python3.6/unittest/main.py in __init__(\r\nself, module, defaultTest, argv, testRunner, testLoader, exit, verbosity, failfast, catchbreak, buffer, warnings, tb\r\n_locals)\r\n     91         self.testLoader = testLoader\r\n     92         self.progName = os.path.basename(argv[0])\r\n---\u003e 93         self.parseArgs(argv)\r\n     94         self.runTests()\r\n     95\r\n\r\n/usr/local/Cellar/python3/3.6.1/Frameworks/Python.framework/Versions/3.6/lib/python3.6/unittest/main.py in parseArg$\r\n(self, argv)\r\n    124                 return\r\n    125         else:\r\n--\u003e 126             self._main_parser.parse_args(argv[1:], self)\r\n    127\r\n    128         if self.tests:\r\n\r\n/usr/local/Cellar/python3/3.6.1/Frameworks/Python.framework/Versions/3.6/lib/python3.6/argparse.py in parse_args(se$\r\nf, args, namespace)\r\n   1731         if argv:\r\n   1732             msg = _('unrecognized arguments: %s')\r\n-\u003e 1733             self.error(msg % ' '.join(argv))\r\n   1734         return args\r\n   1735\r\n\r\n/usr/local/Cellar/python3/3.6.1/Frameworks/Python.framework/Versions/3.6/lib/python3.6/argparse.py in error(self, m$\r\nssage)\r\n   2387         self.print_usage(_sys.stderr)\r\n   2388         args = {'prog': self.prog, 'message': message}\r\n-\u003e 2389         self.exit(2, _('%(prog)s: error: %(message)s\\n') % args)\r\n\r\n/usr/local/Cellar/python3/3.6.1/Frameworks/Python.framework/Versions/3.6/lib/python3.6/argparse.py in exit(self, st$\r\ntus, message)\r\n   2374         if message:\r\n   2375             self._print_message(message, _sys.stderr)\r\n-\u003e 2376         _sys.exit(status)\r\n   2377\r\n   2378     def error(self, message):\r\n\r\nSystemExit: 2\r\n```\r\n\r\n\r\n\r\n\r\nFor reference, on vanilla IPython, the tests actually run but some noise complains at the end too:\r\n\r\n```\r\n$ ipython\r\nPython 3.6.1 (default, Apr  4 2017, 09:40:51)\r\nType 'copyright', 'credits' or 'license' for more information\r\nIPython 6.0.0 -- An enhanced Interactive Python. Type '?' for help.\r\n\r\nIn [1]: import unittest\r\n\r\nIn [2]: class IpythonTest(unittest.TestCase):\r\n   ...:     def test_test(self):\r\n   ...:         self.assertTrue(True)\r\n   ...:\r\n\r\nIn [3]: unittest.main()\r\n.\r\n----------------------------------------------------------------------\r\nRan 1 test in 0.000s\r\n\r\nOK\r\nAn exception has occurred, use %tb to see the full traceback.\r\n\r\nSystemExit: False\r\n\r\n/usr/local/lib/python3.6/site-packages/IPython/core/interactiveshell.py:2855: UserWarning: To exit: use 'exit', 'quit', or Ctrl-D.\r\n  warn(\"To exit: use 'exit', 'quit', or Ctrl-D.\", stacklevel=1)\r\n```","author":{"url":"https://github.com/yamad","@type":"Person","name":"yamad"},"datePublished":"2017-05-25T17:31:51.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":1},"url":"https://github.com/17/rlipython/issues/17"}