save project

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'
+new_data = ""
+with open(r"C:\Users\admin\Desktop\test.txt",'r',encoding='utf-8') as file1:
+    for a in file1:
+        if "小兰:12本"in a:
+            a.replace("小兰：12本","小兰：15本")
+        new_data = new_data + a
+
+with open(r"C:\Users\admin\Desktop\test.txt",'w',encoding='utf-8') as file2:
+    file2.write(new_data)
+