PyDoc: Fix warnings from out of bounds include statement

doc/python_api/examples/gpu.4.py

@@ -1,30 +1,39 @@
 """
-Wireframe Cube using Index Buffer
----------------------------------
+Mesh with Random Vertex Colors
+------------------------------
 """
 import bpy
 import gpu
+import bgl
+import numpy as np
+from random import random
 from gpu_extras.batch import batch_for_shader
 
-coords = (
-    (-1, -1, -1), (+1, -1, -1),
-    (-1, +1, -1), (+1, +1, -1),
-    (-1, -1, +1), (+1, -1, +1),
-    (-1, +1, +1), (+1, +1, +1))
+mesh = bpy.context.active_object.data
+mesh.calc_loop_triangles()
 
-indices = (
-    (0, 1), (0, 2), (1, 3), (2, 3),
-    (4, 5), (4, 6), (5, 7), (6, 7),
-    (0, 4), (1, 5), (2, 6), (3, 7))
+vertices = np.empty((len(mesh.vertices), 3), 'f')
+indices = np.empty((len(mesh.loop_triangles), 3), 'i')
 
-shader = gpu.shader.from_builtin('3D_UNIFORM_COLOR')
-batch = batch_for_shader(shader, 'LINES', {"pos": coords}, indices=indices)
+mesh.vertices.foreach_get(
+    "co", np.reshape(vertices, len(mesh.vertices) * 3))
+mesh.loop_triangles.foreach_get(
+    "vertices", np.reshape(indices, len(mesh.loop_triangles) * 3))
+
+vertex_colors = [(random(), random(), random(), 1) for _ in range(len(mesh.vertices))]
+
+shader = gpu.shader.from_builtin('3D_SMOOTH_COLOR')
+batch = batch_for_shader(
+    shader, 'TRIS',
+    {"pos": vertices, "color": vertex_colors},
+    indices=indices,
+)
 
 
 def draw():
-    shader.bind()
-    shader.uniform_float("color", (1, 0, 0, 1))
+    bgl.glEnable(bgl.GL_DEPTH_TEST)
     batch.draw(shader)
+    bgl.glDisable(bgl.GL_DEPTH_TEST)
 
 
 bpy.types.SpaceView3D.draw_handler_add(draw, (), 'WINDOW', 'POST_VIEW')