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Fix showing SystemExit exception raise inside except handler (#14503)...
Fix showing SystemExit exception raise inside except handler (#14503) Doing something like this: ```python try: 5 / 0 except Exception as e: raise SystemExit ``` was hitting an error inside UltraTB, creating a long traceback of its internals (which, ironically, UltraTB itself then displays correctly :-). `ListTB.get_exception_only()` calls the `ListTB.structured_traceback()` method *specifically* - even if `self` is a subclass, it won't use the subclass's method. However, the exception chaining in that method uses recursion by calling `self.structured_traceback()`, which will use a subclass's method. Tuples were added as an option there to support exception chaining, but not all of the machinery in connected classes expects a tuple. This just skips the exception chaining logic for the `etb=None` case, when we're showing the exception only. I'm not sure this is necessarily the best fix, but I didn't want to spend too much time following code around a module that's old enough to vote. Closes #12104
M Bussonnier - - Load All Authors

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test_splitinput.py
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/ IPython / core / tests / test_splitinput.py
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# coding: utf-8
from IPython.core.splitinput import split_user_input, LineInfo
import pytest
tests = [
("x=1", ("", "", "x", "=1")),
("?", ("", "?", "", "")),
("??", ("", "??", "", "")),
(" ?", (" ", "?", "", "")),
(" ??", (" ", "??", "", "")),
("??x", ("", "??", "x", "")),
("?x=1", ("", "?", "x", "=1")),
("!ls", ("", "!", "ls", "")),
(" !ls", (" ", "!", "ls", "")),
("!!ls", ("", "!!", "ls", "")),
(" !!ls", (" ", "!!", "ls", "")),
(",ls", ("", ",", "ls", "")),
(";ls", ("", ";", "ls", "")),
(" ;ls", (" ", ";", "ls", "")),
("f.g(x)", ("", "", "f.g", "(x)")),
("f.g (x)", ("", "", "f.g", " (x)")),
("?%hist1", ("", "?", "%hist1", "")),
("?%%hist2", ("", "?", "%%hist2", "")),
("??%hist3", ("", "??", "%hist3", "")),
("??%%hist4", ("", "??", "%%hist4", "")),
("?x*", ("", "?", "x*", "")),
("Pérez Fernando", ("", "", "Pérez", " Fernando")),
]
@pytest.mark.parametrize("input, output", tests)
def test_split_user_input(input, output):
assert split_user_input(input) == output
def test_LineInfo():
"""Simple test for LineInfo construction and str()"""
linfo = LineInfo(" %cd /home")
assert str(linfo) == "LineInfo [ |%|cd|/home]"