diff --git a/diy.py b/diy.py
new file mode 100644
index 0000000..f27d536
--- /dev/null
+++ b/diy.py
@@ -0,0 +1,21 @@
+#写入同学们的捐赠明细：'小兰：12本'、'小丽：11本'、'李文：9本'、'张伟：16本'
+
+file=open(r"C:\Users\玛酷机器人\Desktop\test.txt","w",encoding="utf-8")
+file.write("小兰：12本\n")
+file.write("小丽：11本\n")
+file.write("李文：9本\n")
+file.write("张伟：16本\n")
+file.close()
+
+with open(r"C:\Users\玛酷机器人\Desktop\test.txt","a",encoding="utf-8") as file:
+    file.write("小兰:18ben")
+
+with open(r"C:\Users\玛酷机器人\Desktop\test.txt","r",encoding="utf-8") as file:
+    a=file.read()
+    print(a)
+    for data in a:
+        if "小红：18本"in data:
+            print("数据在文件里")
+        else:
+            print("数据不在文件里")
+          
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