diff --git a/diy.py b/diy.py
new file mode 100644
index 0000000..c1200ed
--- /dev/null
+++ b/diy.py
@@ -0,0 +1,20 @@
+# 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'
+with open(r"C:\Users\Administrator\Desktop\test.txt","w",encoding="utf-8")as file1:
+    file1.write('小兰：12本\n')
+    file1.write('小丽：11本\n')
+    file1.write('李文：9本\n')
+    file1.write('张伟：16本\n')
+file1=open(r"C:\Users\Administrator\Desktop\test.txt","r",encoding="utf-8")
+new_data=""
+for data in file1:
+    if '小兰：12本' in data:
+        data.replace('小兰：12本','小兰：13本')
+        print(data)
+    new_data +=data
+#a=file1.read
+
+    #file1.write('j:15\n')
+file1.close()
+file1=open(r"C:\Users\Administrator\Desktop\test.txt","w",encoding="utf-8")
+file1.write(new_data)
+file1.close()