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Switch default Qt bindings to PySide6 #13960

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cb5e895
Switch default Qt bindings to PySide6
cbrnr Jun 13, 2026
b9f1272
Update pyproject.toml
cbrnr Jun 15, 2026
a598994
Add changelog enty
cbrnr Jun 16, 2026
38902c8
Improve wording
cbrnr Jun 16, 2026
abafaee
Fix env file updater
cbrnr Jun 16, 2026
f8dc6f7
Dependency
cbrnr Jun 16, 2026
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1 change: 1 addition & 0 deletions doc/changes/dev/13960.dependency.rst
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Switch the default Qt bindings from PyQt6 to PySide6. As a result, ``mne[full]`` now includes PySide6 instead of PyQt6. Users who prefer PyQt6 can continue to use ``mne[full-pyqt6]``, and ``mne[full-pyside6]`` remains available as an alias for ``mne[full]``. Changes by `Clemens Brunner`_.
11 changes: 5 additions & 6 deletions pyproject.toml
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Expand Up @@ -134,12 +134,11 @@ scripts = {mne = "mne.commands.utils:main"}
[project.optional-dependencies]
# Leave this one here for backward-compat
data = []
full = ["mne[full-no-qt]", "PyQt6 != 6.6.0", "PyQt6-Qt6 != 6.6.0, != 6.7.0"]
full = ["mne[full-no-qt]", "PySide6 != 6.7.0, != 6.8.0, != 6.8.0.1, != 6.9.1"]
# Dependencies for full MNE-Python functionality (other than raw/epochs export)
# We first define a variant without any Qt bindings. The "complete" variant, mne[full],
# makes an opinionated choice and installs PyQt6.
# We also offer two more variants: mne[full-qt6] (which is equivalent to mne[full]),
# and mne[full-pyside6], which will install PySide6 instead of PyQt6.
# makes an opinionated choice and installs PySide6.
# We also offer mne[full-pyqt6], which will install PyQt6 instead of PySide6.
full-no-qt = [
"antio >= 0.5.0",
"curryreader >= 0.1.2",
Expand Down Expand Up @@ -191,8 +190,8 @@ full-no-qt = [
"vtk >= 9.2",
"xlrd",
]
full-pyqt6 = ["mne[full]"]
full-pyside6 = ["mne[full-no-qt]", "PySide6 != 6.7.0, != 6.8.0, != 6.8.0.1, != 6.9.1"]
full-pyqt6 = ["mne[full-no-qt]", "PyQt6 != 6.6.0", "PyQt6-Qt6 != 6.6.0, != 6.7.0"]
full-pyside6 = ["mne[full]"]
# Dependencies for MNE-Python functions that use HDF5 I/O
hdf5 = ["h5io >= 0.2.4", "pymatreader"]

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5 changes: 3 additions & 2 deletions tools/hooks/update_environment_file.py
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Expand Up @@ -14,8 +14,9 @@
pyproj = tomllib.load(fid)

# Get our "full" dependences from `pyproject.toml`, but actually ignore the
# "full" section as it's just "full-noqt" plus PyQt6, and for conda we need PySide
ignore = ("full", "full-pyqt6")
# "full-pyqt6" section as it's just "full-noqt" plus PyQt6. Also ignore "full-pyside6"
# as it's just a redirect to "full".
ignore = ("full-pyqt6", "full-pyside6")
deps = set(pyproj["project"]["dependencies"])
for section, section_deps in pyproj["project"]["optional-dependencies"].items():
if section not in ignore:
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