auto save

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'
 # 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'
-#file1=open(r'C:\Users\Administrator\Desktop\book.txt','w',encoding='utf-8')
-#file1.write('小兰:12本','小丽:11本','李文:9本','张伟:16本')
+#with open(r'C:\Users\Administrator\Desktop\book.txt','w',encoding='utf-8')as file1:
+    #file1.write('唐浩轩:100000000000本')
+new_data=''
 with open(r'C:\Users\Administrator\Desktop\book.txt','r',encoding='utf-8')as file1:    
 with open(r'C:\Users\Administrator\Desktop\book.txt','r',encoding='utf-8')as file1:    
     for data in file1:
     for data in file1:
-        print(data)
+        #print(data)
         if "唐浩轩:100000000000" in data:
         if "唐浩轩:100000000000" in data:
-            print('唐浩轩')
+            #print('唐浩轩')
+            data=data.replace('唐浩轩:100000000000','唐浩轩:10000')
+        new_data+= data
+with open(r'C:\Users\Administrator\Desktop\book.txt','w',encoding='utf-8')as file1:          
+    file1.write(new_data)
+
+with open(r'C:\Users\Administrator\Desktop\book.txt','r',encoding='utf-8')as file1:  
+    a=file1.read()
+    print(a)