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'、'张伟：16本'
+e=open(r"C:\Users\Administrator\Desktop\1111.txt","w",encoding="utf-8")
+e.write('小兰：12本\n')
+e.close()
+
+with open(r"C:\Users\Administrator\Desktop\1111.txt","a",encoding="utf-8") as e:
+    e.write('小强:12本')
+    e.write('李明:15本')
+with open(r"C:\Users\Administrator\Desktop\1111.txt","r",encoding="utf-8") as e:
+    for i in e:
+        if '小强:10本' in i:
+            print("存在")
+        if '小兰：12本' in i:
+            print("存在")
+
+
+
+