save project

diy.py

@@ -4,4 +4,9 @@ file.write("小兰:12本")
 file.close()
 
 with open(r"C:\Users\admin\Desktop\text.txt","a",encoding="utf-8") as file2:
-    file2.write("大白100本\n")
\ No newline at end of file
+    file2.write("大白100本\n")
+
+with open(r"C:\Users\admin\Desktop\text.txt","r",encoding="utf-8") as file3:
+    a=file3.read()
+    if "小兰:12本" in a:
+        print("找到了")
\ No newline at end of file