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("C:\\Users\jxz2\Desktop\测试.txt","r",encoding="utf-8")as file:
-    a=file.read()
-    print(a)
\ No newline at end of file
+  for x in file:
+      if '小兰:12本'in x:
+          print("找到了")
+          x=x.replace('12','10')
+      new_data=new_data+x
+with open("C:\\Users\jxz2\Desktop\测试.txt","w",encoding="utf-8")as file:
+  file.write(new_data)
\ No newline at end of file