写代码最怕啥？HR同学要给100个新员工发入职Offer，行政要制作带公司logo和姓名的季度表彰卡，运营每周都要生成N份格式统一但核心数据不同的周报附件。这些活儿不复杂，但机械校对、替换、排版，费时费力还容易出错，动不动就被吐槽“名字打错了”。

Writing to files is one of the most important things you will learn in any new programming language. This allows you to save user data for future reference, to manipulate large data sets, or to build ...