save project

diy.py

-file1=open(r'C:\Users\CM\Desktop\test.txt','w',encoding='utf-8')
-file1.write('小兰：12本',)
-file1.close()
+with open(r'C:\Users\CM\Desktop\test.txt','a ',encoding='utf-8') as 
+file:
+    file.write('小兰：12本\n')
\ No newline at end of file
+