save project

diy.py

+# 写入同学们的捐赠明细：'小兰：12本'、
+# with open(r"C:\Users\windows\Desktop\juanzeng.txt",'a',encoding='utf-8') as file:
+# file.write("小兰：12本\n")
+# file.write("小丽：11本\n")
+# file.write("李文：9本\n")
+# file.write("张伟：16本\n")
+
+with open(r"C:\Users\windows\Desktop\juanzeng.txt",'r',encoding='utf-8') as file:
+    a=file.readlines()
+    new_data="  "
+    for data in a:
+        print(data)
+        if "小兰：12本" in data:
+            print("数据在文件中")
+            data=data.replace("小兰：12本","小兰：13本")
+        new_data+=data