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import os
import importlib
import pytest
from IPython.terminal.pt_inputhooks import set_qt_api, get_inputhook_name_and_func
guis_avail = []
def _get_qt_vers():
"""If any version of Qt is available, this will populate `guis_avail` with 'qt' and 'qtx'. Due
to the import mechanism, we can't import multiple versions of Qt in one session."""
for gui in ["qt", "qt6", "qt5"]:
print(f"Trying {gui}")
try:
set_qt_api(gui)
importlib.import_module("IPython.terminal.pt_inputhooks.qt")
guis_avail.append(gui)
if "QT_API" in os.environ.keys():
del os.environ["QT_API"]
except ImportError:
pass # that version of Qt isn't available.
except RuntimeError:
pass # the version of IPython doesn't know what to do with this Qt version.
_get_qt_vers()
@pytest.mark.skipif(
len(guis_avail) == 0, reason="No viable version of PyQt or PySide installed."
)
def test_inputhook_qt():
# Choose the "best" Qt version.
gui_ret, _ = get_inputhook_name_and_func("qt")
assert gui_ret != "qt" # you get back the specific version that was loaded.
assert gui_ret in guis_avail
if len(guis_avail) > 2:
# ...and now we're stuck with this version of Qt for good; can't switch.
for not_gui in ["qt6", "qt5"]:
if not_gui != gui_ret:
break
# Try to import the other gui; it won't work.
gui_ret2, _ = get_inputhook_name_and_func(not_gui)
assert gui_ret2 == gui_ret
assert gui_ret2 != not_gui
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