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[Bug]: exception raised in SpanSelector callback puts the selector in an invalid state for later interactions

topic: widgets/UI

Status: Open.

#32327 In matplotlib/matplotlib;

· anntzer opened on Sep 9, 2026

[ENH]: Track PieContainer in Axes.containers

New feature

topic: axes

Status: Open.

#32320 In matplotlib/matplotlib;

· robertoffmoura opened on Sep 8, 2026

[Bug]: misaligned between xticklabel baselines

topic: text

Status: Open.

#32316 In matplotlib/matplotlib;

· anntzer opened on Sep 8, 2026

[Bug]: Modifying NumPy array after passing to set_xticks() unexpectedly alters plot ticks

topic: ticks axis labels

Status: Open.

#32313 In matplotlib/matplotlib;

· williamlus opened on Sep 7, 2026

[Bug]: Calling fig.add_artist(AnchoredText(...)) raises AttributeError during plt.show()

API: argument checkingValidation of acceptable argument valuesValidation of acceptable argument values

Status: Open.

#32312 In matplotlib/matplotlib;

· williamlus opened on Sep 7, 2026

[Bug]: boxplot errors when x and tick_labels are empty

topic: plotting methods

topic: ticks axis labels

Status: Open.

#32304 In matplotlib/matplotlib;

· carlosgmartin opened on Sep 5, 2026

pip install matplot fails (on windows) for Python 3.15.0rc2

Community supportUsers in need of help.Users in need of help.

first-contribution

Status: Open.

#32280 In matplotlib/matplotlib;

· edreamleo opened on Sep 2, 2026

[MNT]: Deprecate internal Cairo backends

backend: cairo

Maintenance

Status: Open.

Task

#32276 In matplotlib/matplotlib;

· QuLogic opened on Sep 1, 2026

[Bug]: Ragged Poly3DCollection projects uninitialized padding, causing nondeterministic overflow

first-contribution

topic: mplot3d

Status: Open.

#32272 In matplotlib/matplotlib;

· xjcl opened on Aug 31, 2026

tripcolor shading="gouraud" streaks/glitch on macOS arm64; shading="flat" is fine

backend: agg

first-contribution

OS: Apple

status: confirmed bug

Status: Open.

#32269 In matplotlib/matplotlib;

· matthew-a12 opened on Aug 31, 2026

Always send an opaque buffer to interactive backends

Performance

status: needs comment/discussionneeds consensus on next stepneeds consensus on next step

topic: backends

Status: Open.

#32258 In matplotlib/matplotlib;

· iccir opened on Aug 29, 2026

[ENH]: Use a valid font cache from a read-only MPLCONFIGDIR instead of rebuilding in a temp dir

first-contribution

New feature

Status: Open.

#32246 In matplotlib/matplotlib;

· rokokol opened on Aug 27, 2026