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\10717\Desktop\新建文件夹\book.txt','w','encoding=''utf-8') as fil:
+    for data in fil:
+        if'小兰:12'in data:
+            data = data.replace('小兰:12','小兰:11')
+            
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