python – What do the values ​​of the os.name attribute mean?

Question:

Understanding the os module. The os.name attribute contains one of the following values: posix, nt, os2, ce, java, riscos.

Posix, nt, os2, rscos – this is understandable. What do the rest, java and ce mean?

Didn't find an explanation in the docs

Answer:

There are many different implementations of Python . Chief among which is CPython . Also compatible with it are: IronPython , Jython and PyPy .

• inCPython , the following are supported as the value of the os.name attribute:
  • posix
  • nt
• IronPython :
  • posix
  • nt
  • ce – Windows CE
• Jython :
  • posix
  • nt
  • os2
  • ce – Windows CE
  • riscos – RISC OS
  • ibmi-IBM
  • java – Jython
• pypy :
  • posix
  • nt
  • os2
  • ce – Windows CE
  • riscos – RISC OS