auto save

diy.py

+#写入同学们的捐赠明细：'小兰：12本'、'小丽：11本'、'文李：9本'、'张伟：16本'
+with open(r"C:\Users\windows\Desktop\捐赠.txt","w",encoding = "utf-8") as f:
+    f.write('小兰：12本\n')
+    f.write('小丽：11本\n')
+    f.write('文李：9本\n')
+    f.write('张伟：16本\n')
+
+new_data = ""
+with open(r"C:\Users\windows\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：12本")
+        new_data  += data
+
+with open(r"C:\Users\windows\Desktop\捐赠.txt","w",encoding = "utf-8") as f:
+    f.write(new_data)
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