save project

diy3.py

+new_data= ''
 with open(r"C:\Users\MC3-07\Desktop\test.txt", "r", encoding="utf-8") as file:
     for data in file:
         if '小兰:12本' in data:
-            print("有")
-        else:
-            print(data)
+            data=data.replace("小兰:12本","小兰:11本")
+        new_data+=data
+    print(new_data,data)
+with open(r"C:\Users\MC3-07\Desktop\test.txt", "w", encoding="utf-8") as file2:
+    file2.write(new_data)
\ No newline at end of file