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'
+f=open(r"C:\Users\李栋\Desktop\此地无银三百两.txt","w",encoding="utf-8")
+f.write("粑粑:10000元\n")
+f.write("麻麻:1000元\n")
+f.write("俞老师:0元\n")
+f.close()
+
+f=open(r"C:\Users\李栋\Desktop\此地无银三百两.txt","a",encoding="utf-8")
+f.write("李昊冉:300两\n")
+f.close()
+
+with open(r"C:\Users\李栋\Desktop\此地无银三百两.txt","r",encoding="utf-8") as a:
+    print(a.read())
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