diff --git a/diy.py b/diy.py
new file mode 100644
index 0000000..15077be
--- /dev/null
+++ b/diy.py
@@ -0,0 +1,18 @@
+# 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'
+D=""
+A=open(r"C:\Users\Administrator\Desktop\新建文本文档.txt","a",encoding="utf-8")as A:
+A.write('小兰:12本\n')
+A.write('小丽:11本\n')
+A.write('李文:9本\n')
+A.write('张伟:16本\n')
+A.close()
+
+with open(r"C:\Users\Administrator\Desktop\新建文本文档.txt","r",encoding="utf-8")as A:
+    for i in A:
+        if "小强:10本" in i:
+            A=A.replace("小强:10本","小强:12本")
+        D+=A
+
+with open(r"C:\Users\Administrator\Desktop\新建文本文档.txt","w",encoding="utf-8")as A:
+    A.write(D)
+