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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).
Lysandros Nikolaou - - Load All Authors

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test_pycolorize.py
70 lines | 1.7 KiB | text/x-python | PythonLexer
/ IPython / utils / tests / test_pycolorize.py
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# coding: utf-8
"""Test suite for our color utilities.
Authors
-------
* Min RK
"""
#-----------------------------------------------------------------------------
# Copyright (C) 2011 The IPython Development Team
#
# Distributed under the terms of the BSD License. The full license is in
# the file COPYING.txt, distributed as part of this software.
#-----------------------------------------------------------------------------
#-----------------------------------------------------------------------------
# Imports
#-----------------------------------------------------------------------------
# our own
import sys
from IPython.utils.PyColorize import Parser
import io
import pytest
@pytest.fixture(scope="module", params=("Linux", "NoColor", "LightBG", "Neutral"))
def style(request):
yield request.param
#-----------------------------------------------------------------------------
# Test functions
#-----------------------------------------------------------------------------
sample = """
def function(arg, *args, kwarg=True, **kwargs):
'''
this is docs
'''
pass is True
False == None
with io.open(ru'unicode', encoding='utf-8'):
raise ValueError("escape \r sequence")
print("wěird ünicoðe")
class Bar(Super):
def __init__(self):
super(Bar, self).__init__(1**2, 3^4, 5 or 6)
"""
def test_parse_sample(style):
"""and test writing to a buffer"""
buf = io.StringIO()
p = Parser(style=style)
p.format(sample, buf)
buf.seek(0)
f1 = buf.read()
assert "ERROR" not in f1
def test_parse_error(style):
p = Parser(style=style)
f1 = p.format(r"\ " if sys.version_info >= (3, 12) else ")", "str")
if style != "NoColor":
assert "ERROR" in f1