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'
+with open(r'C:\Users\windows\Desktop\捐赠.txt',"w",encoding = 'utf-8') as f:
+    f.write("小兰:12本\n")
+    f.write("小丽:11本\n")
+    f.write("李文:9本\n")
+    f.write("张伟:16本\n")
+    f.write("俞老师:12本\n")
+    new_data = ""
+with open(r'C:\Users\windows\Desktop\捐赠.txt',"r",encoding = 'utf-8') as f:
+    for data in f:
+        if "小兰：12本" in f:
+            data = data.replace('小兰12本','小兰11本')
+            new_data = new_data + data
+with open(r'C:\Users\windows\Desktop\捐赠.txt',"w",encoding = 'utf-8') as f:
+    print(new_data)