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'
+# file=open(r"C:\Users\丽达7号\Desktop\XM.txt","w",encoding="utf-8")
+# file.write("小兰:12本\n")
+# file.write("小利:11本\n")
+# file.close()
+a=""
+with open(r"C:\Users\丽达7号\Desktop\XM.txt","r",encoding="utf-8")as file:
+    for i in file:
+        if "小兰：12本" in i:
+            i=i.replace("小兰：12本","小兰：14本")
+            print(9)
+        a=a+i
+with open(r"C:\Users\丽达7号\Desktop\XM.txt","w",encoding="utf-8")as file:
+    file.write(a)
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