Fix is_color_like for 2-tuple of strings

rcomer · rcomer · commit 67ae1d90186e · 2024-06-22T09:14:08.000+01:00
diff --git a/lib/matplotlib/colors.py b/lib/matplotlib/colors.py
@@ -225,7 +225,7 @@ def is_color_like(c):
         return True
     try:
         to_rgba(c)
-    except ValueError:
+    except (TypeError, ValueError):
         return False
     else:
         return True
diff --git a/lib/matplotlib/tests/test_colors.py b/lib/matplotlib/tests/test_colors.py
@@ -19,7 +19,7 @@
 import matplotlib.scale as mscale
 from matplotlib.rcsetup import cycler
 from matplotlib.testing.decorators import image_comparison, check_figures_equal
-from matplotlib.colors import to_rgba_array
+from matplotlib.colors import is_color_like, to_rgba_array
 
 
 @pytest.mark.parametrize('N, result', [
@@ -1702,3 +1702,13 @@ def test_to_rgba_array_none_color_with_alpha_param():
     assert_array_equal(
         to_rgba_array(c, alpha), [[0., 0., 1., 1.], [0., 0., 0., 0.]]
     )
+
+
+@pytest.mark.parametrize('input, expected',
+                         [('red', True),
+                          (('red', 0.5), True),
+                          (['red', 0.5], False),
+                          (('red', 'blue'), False),
+                          (['red', 'blue'], False)])
+def test_is_color_like(input, expected):
+    assert is_color_like(input) is expected
