t是文本模式 b是二进制 打开文件 文件读写 r案例 w只写模式 w案例 a追写模式 可读可写:+配合w/r使用 本栏目推荐文章pythonDay23pythonDay22pythonDay20pythonDay19pythonDay18pythonDay17pythonDay16pythonDay15pythonDay12pythonDay11pythonDay9 pythonDaypythonday9 pythonday9 pythonday pythonday pythonday5 pythonday 22 pythonday7 pythonday 23 pythonday 17 pythonday 19 pythonday 18