save project

diy.py

@@ -3,3 +3,5 @@ files=open(r"c:\Users\karlcarlo\Desktop\dav.txt",'w',encoding='utf-8')
 #files.write('小兰:12本,小丽：11本,李文：9本,张伟:16本')
 files.write('小强：10本\n李明:15本\n')
 files.close()
+with open(r"c:\Users\karlcarlo\Desktop\dav.txt",'a',encoding='utf-8') as files:#追加
+    files.write('小兰12本')