save project

diy.py

@@ -7,3 +7,5 @@ f.write('李文：9本\n')
 f=open(r'D:\test.txt','a',encoding='utf-8')
 f.write('张伟：16本\n')
 f.close()
+with open(r'D:\test.txt','a',encoding='utf-8') as f:
+    f.write('小明：22本')
\ No newline at end of file