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\Administrator\Desktop\test.txt','w',encoding='utf-8') as file1:
     file1.write('小兰:12本')
-
+new_data=''
 with open(r'C:\Users\Administrator\Desktop\test.txt','r',encoding='utf-8')as file1:
     
     for data in file1:
         if '小兰:12本' in data:
-            print('数据在文件中') 
+            data=data.replace('小兰:12本','小兰：13本')
+        new_data +=data
+with open(r'C:\Users\Administrator\Desktop\test.txt','w',encoding='utf-8')as file1:
+    file1.write(new_data)            
+
+
     
 
     
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