save project

test.py

-
+a=''
 with open(r"C:\Users\Windows 10\Desktop\book.txt","r",encoding="utf-8") as file:
     for i in file:
         if '小强：10本' in i:
-            print('小强在')
+            i= i.replace('小强：10本','小强：11本')
         if '小兰：12本' in i:
-            print('小兰在')
\ No newline at end of file
+            i= i.replace('小兰：12本','小兰：14本')
+        a+=i
+
+with open(r"C:\Users\Windows 10\Desktop\book.txt","w",encoding="utf-8") as file:
+    file.write(a)
\ No newline at end of file