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"D:\wwx\test.txt","a",encoding="utf-8") as file:
-    file.write("小兰：12本\n小丽：11本\n李文：9本")
+with open(r"D:\wwx\test.txt","r",encoding="utf-8") as file:
+    datas=""
+    for data in file:
+        if '小强：10本' in data:
+           data=data.replace('小强：10本','小强：11本')
+           print("gai",data)
+        datas=datas+data
+    
+    print(datas)
+
+with open(r"D:\wwx\test.txt","w",encoding="utf-8") as file:
+    file.write(datas)
+
+