save project

diy.py

+# with open(r"C:\Users\windows\Desktop\捐赠.txt","w",encoding="utf-8") as file:
+#     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.write("小强:10本\n")
+
+with open(r"C:\Users\windows\Desktop\捐赠.txt","r",encoding="utf-8") as file:
+    a=file.readlines()
+    new_data=""
+    for data in a:
+        # print(data)
+        if "小兰：12本" in data:
+            print("数据在文件中")
+            data=data.replace("小兰：12本","小兰:14本")
+        new_data=new_data+data
+    print(new_data)
+
+
+with open(r"C:\Users\windows\Desktop\捐赠.txt","w",encoding="utf-8") as file:
+    file=open() 
+    file.write(new_data)
\ No newline at end of file