auto save

diy.py

+# 写入同学们的捐赠明细：'小兰：12本'、'小丽：11本'、'李文：9本'、
+file1=open(r"C:\Users\Administrator\Desktop\test.txt","w",encoding="utf-8")
+file1.write("xiaolan,12ben\n")
+file1.write("xiaoli,11ben\n")
+file1.write("liwen,9ben\n")
+file1.write("zhangwei,16ben\n")
+file1=open(r"C:\Users\Administrator\Desktop\test.txt","a",encoding="utf-8")
+file1.write("xiaoqian,12ben\n")
+file1.write("liwen,13ben\n")
+file1.close()
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