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?

Comienza con la sección “I/O objects (also known as file objects)” del capítulo Data Model y lee la discusión circundante para evaluar si las referencias a sys y io se introducen adecuadamente. El trabajo estará terminado cuando se resuelva si se deben conservar estos ejemplos específicos de módulos o revisar el pasaje para presentarlos únicamente como ejemplos de file objects.