Discussion of sys module in Data Model

Documentation

In the section titled "I/O objects (also known as file objects)" in the Data Model chapter, it says:

The objects sys.stdin, sys.stdout and sys.stderr are initialized to file objects corresponding to the interpreter’s standard input, output and error streams; they are all open in text mode and therefore follow the interface defined by the io.TextIOBase abstract class.

However, neither the sys nor the io modules have been introduced (and probably should not be in this chapter). Is it appropriate to talk about module-specific features here? Or maybe this text should be modified to lean towards those objects just as examples of file objects?

从 Data Model 章节中的“I/O objects (also known as file objects)”部分开始，阅读其周围的讨论，以评估对 sys 和 io 的引用是否得到了恰当的介绍。完成的标准是确定应保留这些特定于模块的示例，还是修改该段内容，仅将它们作为 file objects 的示例来呈现。