save project

snake.py

@@ -43,16 +43,40 @@ while True:
         y-=30
         if y<0:
             y=480
+        if y>480:
+            y=0
+        if x>660:
+            x=0
+        if x<0:
+            x=660
     if heading=='down':
         y+=30
+        if y<0:
+            y=480
         if y>480:
             y=0
+        if x>660:
+            x=0
+        if x<0:
+            x=660
     if heading=='right':
         x+=30
+        if y<0:
+            y=480
+        if y>480:
+            y=0
         if x>660:
             x=0
+        if x<0:
+            x=660
     if heading=='left':
         x-=30
+        if y<0:
+            y=480
+        if y>480:
+            y=0
+        if x>660:
+            x=0
         if x<0:
             x=660
     #增加坐标
@@ -83,6 +107,9 @@ while True:
     if apple_x==x and apple_y==y:        
         apple_x=random.randint(0,21)*30
         apple_y=random.randint(0,15)*30
+    if (apple_x,apple_y) in list:
+        apple_x=random.randint(0,21)*30
+        apple_y=random.randint(0,15)*30
 
     # print(list)      用于检测错误
     # 将果实画上去