save project

diy.py

@@ -2,3 +2,6 @@
 filel = open(r"C:\Users\oo\Desktop\新建文件夹\test.txt","w",encoding="utf-8")
 filel.write("小兰：12本'、'小丽：11本'、'李文：9本'、'张伟：16本")
 filel.close()
+
+with open(r"C:\Users\oo\Desktop\新建文件夹\test.txt","a",encoding="utf-8")as filel:
+    filel.write("小明：13本")
\ No newline at end of file