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'
+new_date=" "
+with open(r'C:\Users\Administrator\Desktop\test.txt',"w",encoding="utf-8")as file: 
+    file.write('小丽：11本\n')
+    file.write('李文：9本\n')
+    file.write('张伟：16本\n')
+
+with open(r'C:\Users\Administrator\Desktop\test.txt',"a",encoding="utf-8")as file:
+    file.write('小强:12本\n')
+    file.write('李明:15本\n')
+with open(r'C:\Users\Administrator\Desktop\test.txt',"r",encoding="utf-8")as file:
+    for date in file:   
+        if "小强:12本" in date:
+            date=date.replace("小强:12本","小强:10本")
+        new_date+=date
+with open(r'C:\Users\Administrator\Desktop\test.txt',"w",encoding="utf-8")as file:
+    file.write(new_date)
+
+
+
+
+
+
+
+
+
+   
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