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:\Uses\CM\Desktop\book.txt","a",encoding="utf-8")
file.write("小强:10本\n")
file.write("李明:15本\n")
file.close()
with open(r"C:\Uses\CM\Desktop\book.txt","a",encoding="utf-8")
    file.write("小强:10本\n")
    file.write("李明:15本\n")