auto save

m.py

+with open(r"C:\Users\栩栩\Documents\lesson12-1\diy.txt","r",encoding='utf-8') as file:
+    new_data = ""
+    a = file.read()
+    for data in a:
+        if "小强：10本" in data:
+            data.replace("小强：10本","小强：11本")
+        new_data += data
+with open(r"C:\Users\栩栩\Documents\lesson12-1\diy.txt","w",encoding='utf-8') as file:
+    file.write(new_data)
+        
\ No newline at end of file