auto save

.idea/workspace.xml

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+<project version="4">
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+  </component>
+  <component name="PropertiesComponent">
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+    <property name="last_opened_file_path" value="$PROJECT_DIR$" />
+    <property name="node.js.detected.package.eslint" value="true" />
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+    <property name="node.js.selected.package.eslint" value="(autodetect)" />
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+    <property name="settings.editor.selected.configurable" value="com.jetbrains.python.configuration.PyActiveSdkModuleConfigurable" />
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+  <component name="RunManager" selected="Python.snake">
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+      <module name="pygame_lesson3_diy1" />
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+      <option name="INPUT_FILE" value="" />
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+      <module name="pygame_lesson3_diy1" />
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+    <SUITE FILE_PATH="coverage/pygame_lesson3_diy1$snake.coverage" NAME="snake Coverage Results" MODIFIED="1703485392684" SOURCE_PROVIDER="com.intellij.coverage.DefaultCoverageFileProvider" RUNNER="coverage.py" COVERAGE_BY_TEST_ENABLED="true" COVERAGE_TRACING_ENABLED="false" WORKING_DIRECTORY="$PROJECT_DIR$" />
+  </component>
+</project>
\ No newline at end of file

snake.py

 import pygame
 from pygame import locals
+from random import randint
 
 # 初始化pygame，为使用硬件做准备
 pygame.init()
@@ -19,6 +20,7 @@ down = pygame.image.load('down.png')        # 头 朝下
 
 x, y = 240, 120
 position = [(180, 90), (180, 120), (210, 120), (x, y)]
+apple_x,apple_y = 360, 300
 
 setheading = "right"
 snake_head = right
@@ -52,6 +54,12 @@ while True:
     else:
         y += 30
     position.append((x, y))
+    if x ==apple_x and y == apple_y:
+        apple_x = randint(0,21)
+        apple_x *= 30
+        apple_y = randint(0,15)
+        apple_y *= 30
+    else:
         position.pop(0)
     # 将背景图画上去
     screen.blit(background, (0, 0))
@@ -62,7 +70,7 @@ while True:
         screen.blit(body, position[i])
 
     # 将果实画上去
-    screen.blit(food, (360, 300))
+    screen.blit(food, (apple_x,apple_y))
     # 刷新画面
     pygame.display.update()
     FPSCLOCK.tick(3)
\ No newline at end of file