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=''
 file=open(r"C:\Users\Public\Desktop\book.txt","w",encoding='UTF-8')
 file.write("小兰：12本,小丽：11本,李文：9本,张伟：16本")
 file.close()
 with open(r"C:\Users\Administrator\Desktop\book.txt","r",encoding='UTF-8') as file1:
         #file.write('小兰:12\n')
         for data in file1:
-                print(data)
\ No newline at end of file
+                if '小兰:12本' in data:
+                        data=data.replace('小兰：12本','小兰：10本')
+                new_data +=data
+with open(r"C:\Users\Administrator\Desktop\book.txt","w",encoding='UTF-8') as file1:
+        file.write(new_data)                                
\ No newline at end of file