auto save

diy.py

-# 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'
+#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'
+f = open(r"C:\Users\Administrator\Desktop\捐赠.txt","w",encoding = "utf-8")
+f.write('小丽：11本')
+f.write('李文：9本')
+f.write('张伟：16本')
+f.close()
+
+new_data= " "
+with open(r"C:\Users\Administrator\Desktop\捐赠.txt","r",encoding = "utf-8") as f:
+
+    for data in f:
+        if "小丽：11本" in data:
+            data = data.replace("小丽：11本","小丽：50")
+        new_data = new_data+data
+  
+
+with open(r"C:\Users\Administrator\Desktop\捐赠.txt","w",encoding = "utf-8") as f:
+    f.write(new_data)