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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).
Nikita Kniazev - - Load All Authors

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test_shellapp.py
56 lines | 1.8 KiB | text/x-python | PythonLexer
/ IPython / core / tests / test_shellapp.py
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# -*- coding: utf-8 -*-
"""Tests for shellapp module.
Authors
-------
* Bradley Froehle
"""
#-----------------------------------------------------------------------------
# Copyright (C) 2012 The IPython Development Team
#
# Distributed under the terms of the BSD License. The full license is in
# the file COPYING, distributed as part of this software.
#-----------------------------------------------------------------------------
#-----------------------------------------------------------------------------
# Imports
#-----------------------------------------------------------------------------
import unittest
from IPython.testing import decorators as dec
from IPython.testing import tools as tt
class TestFileToRun(tt.TempFileMixin, unittest.TestCase):
"""Test the behavior of the file_to_run parameter."""
def test_py_script_file_attribute(self):
"""Test that `__file__` is set when running `ipython file.py`"""
src = "print(__file__)\n"
self.mktmp(src)
err = None
tt.ipexec_validate(self.fname, self.fname, err)
def test_ipy_script_file_attribute(self):
"""Test that `__file__` is set when running `ipython file.ipy`"""
src = "print(__file__)\n"
self.mktmp(src, ext='.ipy')
err = None
tt.ipexec_validate(self.fname, self.fname, err)
# The commands option to ipexec_validate doesn't work on Windows, and it
# doesn't seem worth fixing
@dec.skip_win32
def test_py_script_file_attribute_interactively(self):
"""Test that `__file__` is not set after `ipython -i file.py`"""
src = "True\n"
self.mktmp(src)
out, err = tt.ipexec(
self.fname,
options=["-i"],
commands=['"__file__" in globals()', "print(123)", "exit()"],
)
assert "False" in out, f"Subprocess stderr:\n{err}\n-----"