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'
+# sb=open(r'C:\Users\XMBC\Desktop\text.txt','w',encoding='utf-8')
+# sb.write('小兰:12本','小丽:11本','李文:9本','张伟:16本')
+# sb.close()
+new_data=''
+with open(r'C:\Users\XMBC\Desktop\text.txt','r',encoding='utf-8')as text:
+    for data in text:
+        if '小兰:12本' in data:
+        data.replace('小兰:12本','小兰:13本')
+        new_data+=data
+    print(new_data)
+