Update README.md

README.md

@@ -865,6 +865,13 @@ The Crello dataset has 3 splits: train, validation, and test. The current split
 Each example can be visualized in the following approach. Note the following does not guarantee a similar appearance to the original template.
 
 ```python
+import io
+from typing import Any, Dict
+
+import numpy as np
+import skia
+
+
 def render(dataset: datasets.Dataset, example: Dict[str, Any], max_size: float=512.) -> bytes:
     """Render parsed sequence example onto an image and return as PNG bytes."""
     canvas_width = int(dataset.features["canvas_width"].int2str(example["canvas_width"]))
@@ -878,7 +885,7 @@ def render(dataset: datasets.Dataset, example: Dict[str, Any], max_size: float=5
         for index in range(example["length"]):
             pil_image = example["image"][index]
             image = skia.Image.frombytes(
-                pil_image.convert("RGBA").tobytes(),
+                pil_image.convert('RGBA').tobytes(),
                 pil_image.size,
                 skia.kRGBA_8888_ColorType)
             left = example["left"][index] * canvas_width
@@ -888,14 +895,11 @@ def render(dataset: datasets.Dataset, example: Dict[str, Any], max_size: float=5
             rect = skia.Rect.MakeXYWH(left, top, width, height)
 
             angle = example["angle"][index]
-            if angle != 0:
-                degree = 180. * angle / np.pi
-                canvas.save()
-                canvas.rotate(degree, left + width / 2., top + height / 2.)
-
-            canvas.drawImageRect(image, rect)
-            if angle != 0:
-                canvas.restore()
+            with skia.AutoCanvasRestore(canvas):
+                if angle != 0:
+                    degree = 180. * angle / np.pi
+                    canvas.rotate(degree, left + width / 2., top + height / 2.)
+                canvas.drawImageRect(image, rect)
 
     image = surface.makeImageSnapshot()
     with io.BytesIO() as f: