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Refuse to install event loop hooks when not using `prompt_toolkit` (#14132)...
Refuse to install event loop hooks when not using `prompt_toolkit` (#14132) Without this, `%gui` is effectively a no-op but the user thinks it works. For example. If running `ipython`: ``` In [1]: import matplotlib; matplotlib.use('QtAgg'); from matplotlib import pyplot; pyplot.ion(); pyplot.plot([1, 2, 3, 4]) Installed qt6 event loop hook. Out[1]: [<matplotlib.lines.Line2D at 0x1ba2f59d2a0>] ``` The window appears and responds as expected. If running `ipython --simple-prompt`, the user would see the same output, when in fact no event loop hook was installed since it's not supported without `prompt_toolkit`. The resulting Qt window is unresponsive because the event loop is not running, i.e. with `--simple-prompt`, Qt windows should block (but `pyplot` doesn't/can't know to do that) With this PR, the user will see: ``` In [1]: import matplotlib; matplotlib.use('QtAgg'); from matplotlib import pyplot; pyplot.ion(); pyplot.plot([1, 2, 3, 4]) Cannot install event loop hook for "qt" when running with `--simple-prompt`. NOTE: Tk is supported natively; use Tk apps and Tk backends with `--simple-prompt`. Out[1]: [<matplotlib.lines.Line2D at 0x170be0c0310>] ``` They'll still get an unresponsive Qt window, but they'll at least be told this can't work (while anything using Tk will work just fine).
Matthias Bussonnier - - Load All Authors

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test_splitinput.py
39 lines | 1.2 KiB | text/x-python | PythonLexer
/ IPython / core / tests / test_splitinput.py
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# coding: utf-8
from IPython.core.splitinput import split_user_input, LineInfo
from IPython.testing import tools as tt
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*", "")),
]
tests.append(("Pérez Fernando", ("", "", "Pérez", "Fernando")))
def test_split_user_input():
return tt.check_pairs(split_user_input, tests)
def test_LineInfo():
"""Simple test for LineInfo construction and str()"""
linfo = LineInfo(" %cd /home")
assert str(linfo) == "LineInfo [ |%|cd|/home]"