matplotlib 3.10 compat

cmbant · Feb 21, 2025 · 9003a66 · 9003a66
1 parent 3f4297e
commit 9003a66
Showing 1 changed file with 6 additions and 4 deletions.
diff --git a/getdist/plots.py b/getdist/plots.py
@@ -1130,10 +1130,12 @@ def clean_args(_args):
             kwargs['alpha'] = alpha
             cs = ax.contour(density.x, density.y, z, sorted(contour_levels), colors=cols, linestyles=linestyles,
                             linewidths=lws, **clean_args(kwargs))
-            dashes = args.get('dashes')
-            if dashes:
-                for c in cs.collections:
-                    c.set_dashes([(0, dashes)])
+            if dashes := args.get('dashes'):
+                if hasattr(cs, 'collections'):
+                    for c in cs.collections:
+                        c.set_dashes([(0, dashes)])
+                else:  # matplotlib 3.8+
+                    cs.set_dashes([(0, dashes)] * len(cs.levels))
             if proxy_ix >= 0:
                 line = matplotlib.lines.Line2D([0, 1], [0, 1], ls=linestyles[0], lw=lws, color=cols[0],
                                                alpha=args.get('alpha'))