save project

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'
+a=open(r"D:\book.txt","w",encoding="utf-8")
+a.write("小兰：12本")
+a.close()
+
+with open(r"D:\book.txt","a",encoding="utf-8") as a:
+     for v in a:
+         if "小强：10本" in v:
+             print("数据在文件里")
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