diff --git "a/data/1.OpenCV\345\210\235\351\230\266/1.OpenCV\345\237\272\347\241\200/4.IO\344\270\216GUI/doodle.md" "b/data/1.OpenCV\345\210\235\351\230\266/1.OpenCV\345\237\272\347\241\200/4.IO\344\270\216GUI/doodle.md"
index b8cb2dec69b72d3945132f097c5aaf433003df77..1ad36edca7efa9d99e2baf0ec727e13d9776f8c9 100644
--- "a/data/1.OpenCV\345\210\235\351\230\266/1.OpenCV\345\237\272\347\241\200/4.IO\344\270\216GUI/doodle.md"
+++ "b/data/1.OpenCV\345\210\235\351\230\266/1.OpenCV\345\237\272\347\241\200/4.IO\344\270\216GUI/doodle.md"
@@ -49,8 +49,7 @@ class Painter:
         # TODO(You): 请正确实现画板事件响应，完成功能
 
     def clean(self):
-        cv.rectangle(self.img, (0, 0),
-                     (self.height, self.width), (0, 0, 0), -1)
+        cv.rectangle(self.img, (0, 0), (self.height, self.width), (0, 0, 0), -1)
 
     def begin_draw_rectangle(self, pos1, pos2):
         if self.color is None: