Merge pull request matplotlib#27662 from meeseeksmachine/auto-backport-of-pr-27657-on-v3.8.x

Backport PR matplotlib#27657 on branch v3.8.x (Fix Numpy 2.0 related test failures)

Author: ksunden

lib/matplotlib/pylab.py

@@ -60,6 +60,8 @@
 bytes = __import__("builtins").bytes
 # We also don't want the numpy version of these functions
 abs = __import__("builtins").abs
+bool = __import__("builtins").bool
 max = __import__("builtins").max
 min = __import__("builtins").min
+pow = __import__("builtins").pow
 round = __import__("builtins").round

lib/matplotlib/tests/test_axes.py

@@ -5735,7 +5735,12 @@ def test_text_labelsize():
     ax.tick_params(direction='out')
 
 
-@image_comparison(['pie_default.png'])
+# Note: The `pie` image tests were affected by Numpy 2.0 changing promotions
+# (NEP 50). While the changes were only marginal, tolerances were introduced.
+# These tolerances could likely go away when numpy 2.0 is the minimum supported
+# numpy and the images are regenerated.
+
+@image_comparison(['pie_default.png'], tol=0.01)
 def test_pie_default():
     # The slices will be ordered and plotted counter-clockwise.
     labels = 'Frogs', 'Hogs', 'Dogs', 'Logs'
@@ -5748,7 +5753,7 @@ def test_pie_default():
 
 
 @image_comparison(['pie_linewidth_0', 'pie_linewidth_0', 'pie_linewidth_0'],
-                  extensions=['png'], style='mpl20')
+                  extensions=['png'], style='mpl20', tol=0.01)
 def test_pie_linewidth_0():
     # The slices will be ordered and plotted counter-clockwise.
     labels = 'Frogs', 'Hogs', 'Dogs', 'Logs'
@@ -5780,7 +5785,7 @@ def test_pie_linewidth_0():
     plt.axis('equal')
 
 
-@image_comparison(['pie_center_radius.png'], style='mpl20')
+@image_comparison(['pie_center_radius.png'], style='mpl20', tol=0.005)
 def test_pie_center_radius():
     # The slices will be ordered and plotted counter-clockwise.
     labels = 'Frogs', 'Hogs', 'Dogs', 'Logs'
@@ -5800,7 +5805,7 @@ def test_pie_center_radius():
     plt.axis('equal')
 
 
-@image_comparison(['pie_linewidth_2.png'], style='mpl20')
+@image_comparison(['pie_linewidth_2.png'], style='mpl20', tol=0.01)
 def test_pie_linewidth_2():
     # The slices will be ordered and plotted counter-clockwise.
     labels = 'Frogs', 'Hogs', 'Dogs', 'Logs'
@@ -5815,7 +5820,7 @@ def test_pie_linewidth_2():
     plt.axis('equal')
 
 
-@image_comparison(['pie_ccw_true.png'], style='mpl20')
+@image_comparison(['pie_ccw_true.png'], style='mpl20', tol=0.01)
 def test_pie_ccw_true():
     # The slices will be ordered and plotted counter-clockwise.
     labels = 'Frogs', 'Hogs', 'Dogs', 'Logs'
@@ -5830,7 +5835,7 @@ def test_pie_ccw_true():
     plt.axis('equal')
 
 
-@image_comparison(['pie_frame_grid.png'], style='mpl20')
+@image_comparison(['pie_frame_grid.png'], style='mpl20', tol=0.002)
 def test_pie_frame_grid():
     # The slices will be ordered and plotted counter-clockwise.
     labels = 'Frogs', 'Hogs', 'Dogs', 'Logs'
@@ -5857,7 +5862,7 @@ def test_pie_frame_grid():
     plt.axis('equal')
 
 
-@image_comparison(['pie_rotatelabels_true.png'], style='mpl20')
+@image_comparison(['pie_rotatelabels_true.png'], style='mpl20', tol=0.009)
 def test_pie_rotatelabels_true():
     # The slices will be ordered and plotted counter-clockwise.
     labels = 'Hogwarts', 'Frogs', 'Dogs', 'Logs'
@@ -5872,7 +5877,7 @@ def test_pie_rotatelabels_true():
     plt.axis('equal')
 
 
-@image_comparison(['pie_no_label.png'])
+@image_comparison(['pie_no_label.png'], tol=0.01)
 def test_pie_nolabel_but_legend():
     labels = 'Frogs', 'Hogs', 'Dogs', 'Logs'
     sizes = [15, 30, 45, 10]
@@ -5886,7 +5891,7 @@ def test_pie_nolabel_but_legend():
     plt.legend()
 
 
-@image_comparison(['pie_shadow.png'], style='mpl20')
+@image_comparison(['pie_shadow.png'], style='mpl20', tol=0.002)
 def test_pie_shadow():
     # Also acts as a test for the shade argument of Shadow
     sizes = [15, 30, 45, 10]

lib/matplotlib/tests/test_colors.py

@@ -1371,38 +1371,38 @@ def test_scalarmappable_to_rgba(bytes):
     # uint8 RGBA
     x = np.ones((2, 3, 4), dtype=np.uint8)
     expected = x.copy() if bytes else x.astype(np.float32)/255
-    np.testing.assert_array_equal(sm.to_rgba(x, bytes=bytes), expected)
+    np.testing.assert_almost_equal(sm.to_rgba(x, bytes=bytes), expected)
     # uint8 RGB
     expected[..., 3] = alpha_1
-    np.testing.assert_array_equal(sm.to_rgba(x[..., :3], bytes=bytes), expected)
+    np.testing.assert_almost_equal(sm.to_rgba(x[..., :3], bytes=bytes), expected)
     # uint8 masked RGBA
     xm = np.ma.masked_array(x, mask=np.zeros_like(x))
     xm.mask[0, 0, 0] = True
     expected = x.copy() if bytes else x.astype(np.float32)/255
     expected[0, 0, 3] = 0
-    np.testing.assert_array_equal(sm.to_rgba(xm, bytes=bytes), expected)
+    np.testing.assert_almost_equal(sm.to_rgba(xm, bytes=bytes), expected)
     # uint8 masked RGB
     expected[..., 3] = alpha_1
     expected[0, 0, 3] = 0
-    np.testing.assert_array_equal(sm.to_rgba(xm[..., :3], bytes=bytes), expected)
+    np.testing.assert_almost_equal(sm.to_rgba(xm[..., :3], bytes=bytes), expected)
 
     # float RGBA
     x = np.ones((2, 3, 4), dtype=float) * 0.5
     expected = (x * 255).astype(np.uint8) if bytes else x.copy()
-    np.testing.assert_array_equal(sm.to_rgba(x, bytes=bytes), expected)
+    np.testing.assert_almost_equal(sm.to_rgba(x, bytes=bytes), expected)
     # float RGB
     expected[..., 3] = alpha_1
-    np.testing.assert_array_equal(sm.to_rgba(x[..., :3], bytes=bytes), expected)
+    np.testing.assert_almost_equal(sm.to_rgba(x[..., :3], bytes=bytes), expected)
     # float masked RGBA
     xm = np.ma.masked_array(x, mask=np.zeros_like(x))
     xm.mask[0, 0, 0] = True
     expected = (x * 255).astype(np.uint8) if bytes else x.copy()
     expected[0, 0, 3] = 0
-    np.testing.assert_array_equal(sm.to_rgba(xm, bytes=bytes), expected)
+    np.testing.assert_almost_equal(sm.to_rgba(xm, bytes=bytes), expected)
     # float masked RGB
     expected[..., 3] = alpha_1
     expected[0, 0, 3] = 0
-    np.testing.assert_array_equal(sm.to_rgba(xm[..., :3], bytes=bytes), expected)
+    np.testing.assert_almost_equal(sm.to_rgba(xm[..., :3], bytes=bytes), expected)
 
 
 def test_failed_conversions():