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'
+xin=""
 with open(r'C:\Users\Administrator\Desktop\st.txt','r',encoding='utf-8') as file1:
     for data in file1:
         if '小强:' in data:
             data=data.replace('小强：10本','小强：11本')
+        xin +=data                    
+with open(r'C:\Users\Administrator\Desktop\st.txt','w',encoding='utf-8') as file1:
+    file1.write(xin)
+with open(r'C:\Users\Administrator\Desktop\st.txt','r',encoding='utf-8') as file1:
+    a=file1.read()
+    print(a)
\ No newline at end of file