三种I/O类型
- Binary: expects and produces bytes objects, 不会编解码，不会换行
- Text: expects and produces str objects， 自动编解码和换行
- Raw(unbuffered): uilding-block for binary and text streams
底层类
- 抽象基类IOBase: 无read/write方法
- RawIOBase: raw binary I/O
- BufferedIOBase: binary stream
Buffered Sreams
- BytesIO: an in-memory buffer bytes stream
- StringIO: an in-memory buffer str stream
select
- select: 用法 select([read_fds, write_fds, exception_fds], timeout)， select要求fileno小于1024
- poll
selectors
- 按位来区分订阅的事件类型： READ :1, WRITE: 2, READWRITE: 3
- SelectSelector: 使用select获取fds的状态
- PollSelector: 使用poll获取fds的状态
- EpollSelector: 使用epoll获取fds的状态
参考