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Commit3ecf087

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FixAttributeError: module 'gi' has no attribute 'require_version'
On Arch Linux, automatic backend selection fails when[`at-spi2-core`](https://archlinux.org/packages/extra/x86_64/at-spi2-core/files/)is installed but[`python-gobject`](https://archlinux.org/packages/extra/x86_64/python-gobject/files/)is not. Detect this by importign `gi.require_version` directly.```python>>> import matplotlib.pyplot as plt>>> plt.plot([0, 1], [0, 1])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'```Fixes#30654.
1 parent9b61b47 commit3ecf087

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2 files changed

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-6
lines changed

2 files changed

+7
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‎lib/matplotlib/backends/backend_gtk3.py‎

Lines changed: 3 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -10,18 +10,18 @@
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CloseEvent,KeyEvent,LocationEvent,MouseEvent,ResizeEvent)
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try:
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importgi
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fromgiimportrequire_versionasgi_require_version
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exceptImportErroraserr:
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raiseImportError("The GTK3 backends require PyGObject")fromerr
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try:
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# :raises ValueError: If module/version is already loaded, already
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# required, or unavailable.
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gi.require_version("Gtk","3.0")
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gi_require_version("Gtk","3.0")
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# Also require GioUnix to avoid PyGIWarning when Gio is imported
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# GioUnix is platform-specific and may not be available on all systems
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try:
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gi.require_version("GioUnix","2.0")
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gi_require_version("GioUnix","2.0")
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exceptValueError:
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# GioUnix is not available on this platform, which is fine
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pass

‎lib/matplotlib/backends/backend_gtk4.py‎

Lines changed: 4 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -9,18 +9,18 @@
99
KeyEvent,LocationEvent,MouseEvent,ResizeEvent,CloseEvent)
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1111
try:
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importgi
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fromgiimportrequire_versionasgi_require_version
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exceptImportErroraserr:
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raiseImportError("The GTK4 backends require PyGObject")fromerr
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try:
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# :raises ValueError: If module/version is already loaded, already
1818
# required, or unavailable.
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gi.require_version("Gtk","4.0")
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gi_require_version("Gtk","4.0")
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# Also require GioUnix to avoid PyGIWarning when Gio is imported
2121
# GioUnix is platform-specific and may not be available on all systems
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try:
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gi.require_version("GioUnix","2.0")
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gi_require_version("GioUnix","2.0")
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exceptValueError:
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# GioUnix is not available on this platform, which is fine
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pass
@@ -29,6 +29,7 @@
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# auto-backend selection logic correctly skips.
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raiseImportError(e)frome
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importgi
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fromgi.repositoryimportGio,GLib,Gtk,Gdk,GdkPixbuf
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from .import_backend_gtk
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from ._backend_gtkimport (# noqa: F401 # pylint: disable=W0611

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