auto save

diy.py

@@ -13,8 +13,13 @@ with open(r'E:\demo\books.txt','a',encoding='utf-8') as file1:
     file1.write('喜羊洋：1010本\n')
     file1.write('喜羊洋：1010本\n')
 
 
 
 
-
+data=''
 with open(r'E:\demo\books.txt','r',encoding='utf-8') as file1:
 with open(r'E:\demo\books.txt','r',encoding='utf-8') as file1:
     for i in file1:
     for i in file1:
-        if "小力：11本" in i:
-            print("存在的")
+        if "小兰：12本" in i:
+           i=i.replace('小兰：12本','小兰：22本')
+        data+=i
+with open(r'E:\demo\books.txt','w',encoding='utf-8') as file1:  
+    file1.write(data)      
+
+