auto save

diy1.py

-new_data=''
-with open(r"C:\Users\xxd\Desktop\j.txt",'r',encoding='utf-8') as file1:    
-    
-    for data in file1:
-        if '小强:10本' in data:
-            data=data.replace('小强:10本','小强:11本')
-        new_data +=data
-
-with open(r"C:\Users\xxd\Desktop\book.txt","a",encoding='utf-8')as file1:
-    file1.write(new_data) 
\ No newline at end of file
+with open(r"C:\Users\xxd\Desktop\j.txt",'r',encoding='utf-8') as fill:
+    a=[fill.read()]
+    for i in a:
+        if 'ads' in i:
+            print('在文件中')
\ No newline at end of file