auto save

1.py

+new_data=""
+with open(r"C:\Users\周周\Desktop\text.txt","r",encoding='utf-8') as file1:
+    for data in file1:
+        if '小强：2本' in data:
+            data=data.replace('小强：2本','小强：10本')
+            new_data+=data
+ 
+with open(r"C:\Users\周周\Desktop\text.txt","w",encoding='utf-8') as file1:
+    file1.write(new_data)
+
+with open(r"C:\Users\周周\Desktop\text.txt","r",encoding='utf-8') as file1:
+    a=file1.read()
+    print(a)
+    
\ No newline at end of file

6.py

+new_data=''
+with open('C:\\Users\\周周\\Desktop\\book.txt','r',encoding='utf-8') as file1:
+    for data in file1:
+        if '小兰：12本' in data:
+            data=data.replace('小兰：12本','小U：11本')
+        if '小丽：11本' in data:
+            data=data.replace('小丽：11本','小P：10本')
+        new_data=new_data+data
+
+with open('C:\\Users\\周周\\Desktop\\book.txt','w',encoding='utf-8') as file1:
+    file1.write(new_data)
+
+with open('C:\\Users\\周周\\Desktop\\book.txt','r',encoding='utf-8') as file1:
+    a=file1.read()
+    print(a)
\ No newline at end of file