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Description
Bug summary
Plotting something raises AttributeError: module 'gi' has no attribute 'require_version' on Arch Linux when at-spi2-core is installed, but python-gobject is not.
Code for reproduction
import matplotlib.pyplot as plt
plt.plot([0, 1], [0, 1])Actual outcome
Traceback (most recent call last):
File "<python-input-1>", line 1, in <module>
plt.plot([0, 1], [0, 1])
~~~~~~~~^^^^^^^^^^^^^^^^
File "/usr/lib/python3.13/site-packages/matplotlib/pyplot.py", line 3838, in plot
return gca().plot(
~~~^^
File "/usr/lib/python3.13/site-packages/matplotlib/pyplot.py", line 2785, in gca
return gcf().gca()
~~~^^
File "/usr/lib/python3.13/site-packages/matplotlib/pyplot.py", line 1108, in gcf
return figure()
File "/usr/lib/python3.13/site-packages/matplotlib/pyplot.py", line 1042, in figure
manager = new_figure_manager(
num, figsize=figsize, dpi=dpi,
facecolor=facecolor, edgecolor=edgecolor, frameon=frameon,
FigureClass=FigureClass, **kwargs)
File "/usr/lib/python3.13/site-packages/matplotlib/pyplot.py", line 551, in new_figure_manager
_warn_if_gui_out_of_main_thread()
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
File "/usr/lib/python3.13/site-packages/matplotlib/pyplot.py", line 528, in _warn_if_gui_out_of_main_thread
canvas_class = cast(type[FigureCanvasBase], _get_backend_mod().FigureCanvas)
~~~~~~~~~~~~~~~~^^
File "/usr/lib/python3.13/site-packages/matplotlib/pyplot.py", line 369, in _get_backend_mod
switch_backend(rcParams._get("backend"))
~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3.13/site-packages/matplotlib/pyplot.py", line 411, in switch_backend
switch_backend(candidate)
~~~~~~~~~~~~~~^^^^^^^^^^^
File "/usr/lib/python3.13/site-packages/matplotlib/pyplot.py", line 425, in switch_backend
module = backend_registry.load_backend_module(newbackend)
File "/usr/lib/python3.13/site-packages/matplotlib/backends/registry.py", line 317, in load_backend_module
return importlib.import_module(module_name)
~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^
File "/usr/lib/python3.13/importlib/__init__.py", line 88, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "<frozen importlib._bootstrap>", line 1387, in _gcd_import
File "<frozen importlib._bootstrap>", line 1360, in _find_and_load
File "<frozen importlib._bootstrap>", line 1331, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 935, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 1026, in exec_module
File "<frozen importlib._bootstrap>", line 488, in _call_with_frames_removed
File "/usr/lib/python3.13/site-packages/matplotlib/backends/backend_gtk4agg.py", line 4, in <module>
from . import backend_agg, backend_gtk4
File "/usr/lib/python3.13/site-packages/matplotlib/backends/backend_gtk4.py", line 19, in <module>
gi.require_version("Gtk", "4.0")
^^^^^^^^^^^^^^^^^^
AttributeError: module 'gi' has no attribute 'require_version'
Expected outcome
No nondescript error, potentially a plot if a suitable backend is installed.
Other discussions observing this issue in matplotlib
AUTOMATIC1111/stable-diffusion-webui#10373
RVC-Boss/GPT-SoVITS#2619
cschwan/sage-on-gentoo#665
enkore/i3pystatus#314
msys2/MINGW-packages#19540
ravin-d-27/PyDeepFlow#40
Documentation that mentions this issue
https://wiki.archlinux.org/index.php?title=Redshift&oldid=844147#Redshift_does_not_appear_in_system_tray
https://github.com/volzotan/CompressorCam/blob/1ea06249a0d5de7708dda5c699beda26ea7582fe/software/compressor/README.md?plain=1#L32-L36
https://github.com/BenMiriello/Jarvis/blob/3d14e935035b28959e15db0c64809fed5bb4ca0d/Raspberry_Pi_Install_Instructions.md?plain=1#L88
Workarounds in software for this issue
Other software with the same bug (relying on python-gobject without having it installed)
jeffreywildman/homebrew-virt-manager#74
atlast/Postgres-GUI#4
bhrigu123/Instant-Lyrics#7
MyDuerOS/DuerOS-Python-Client#5
MyDuerOS/DuerOS-Python-Client#14
MyDuerOS/DuerOS-Python-Client#16
TheImagingSource/Linux-tiscamera-Programming-Samples#43
adrienverge/PhotoCollage#105
GabMus/gestureManager#2
voc/voctomix#341
rjw57/videosequence#2
calebstewart/gmusicclient#1 (comment)
C2N14/AutomaThemely#49
ivan-hc/GIMP-appimage#31
borisbabic/browser_cookie3#53
korcankaraokcu/PINCE@74d1c1f
Operating system
Arch Linux
Matplotlib Version
3.10.6
Matplotlib Backend
crashes with the same error as above
Python version
3.13.7
Jupyter version
n/a
Installation
Linux package manager