save project

func.py

-with open(r'C:\Users\CM\Desktop\book.txt','r',encoding='utf-8') as file1:
+new_data=''   
+with open(r'C:\Users\CM\Desktop\book.txt','r',encoding='utf-8') as file1:    
     for data in file1:
         if '小强:10本' in data:
-            print('小强数据在文中')
+            data=data.replace('小强:10本','小强:11本')
         if '小兰:10本'in data:
-            print('小兰数据在文中')
\ No newline at end of file
+            data=data.replace('小兰:12本','小兰:14本')
+        new_data +=data
+        
+with open(r'C:\Users\CM\Desktop\book.txt','w',encoding='utf-8') as file1:
+    file1.write(new_data)
+    
+with open(r'C:\Users\CM\Desktop\book.txt','w',encoding='utf-8') as file1:
+    a=file1.read()
+    print(a)