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'
+newdata=""
+with open(r'C:\test.txt',"r",encoding="utf-8") as file1:
+    for data in file1:
+        if("小兰：12" in data)：
+            data.replace("小兰：12","小兰：200")
+        newdata +=data
 with open(r'C:\test.txt',"w",encoding="utf-8") as file1:
-    file1.write("小兰：12\n")
-    file1.write("小丽：11\n")
-    file1.write("李文：9\n")
-    file1.write("张伟：16\n")
+    file2.write(newdata)
     
\ No newline at end of file