os.name

Overview:

Developing a portable program means writing a program that can be made to run on any operating system with minimal to no changes made to that program.
The os module implements functions that interact with the operating system directly.
Like any other modules of Python, the os module is also written adhering to the good principles of software design.
The os module internally imports one of the required platform specific modules like posix or nt by checking the sys.builtin_module_names. If the sys.builtin_module_names contains "posix", the module posix is imported by the os module. Else, if the sys.builtin_module_names contains "nt" the module nt is imported.
The string literal os.name, reflects this name of the operating system dependent module being imported for portability by the os module.

Python os.name

Example:

# Example Python program that gets the current os dependent module
# loaded by the module os(which is written addressing portability considerations)
import os
import sys

# Modules this Python version was built with
print("The modules that were built into this Python interpreter:");
print(sys.builtin_module_names);

# Name of the module internally loaded by the os module
osDepModuleName = os.name;
print("os module has loaded the following os dependent module:");
print(osDepModuleName);

Output:

The modules that were built into this Python interpreter:

('_abc', '_ast', '_codecs', '_collections', '_functools', '_imp', '_io', '_locale', '_operator', '_peg_parser', '_signal', '_sre', '_stat', '_string', '_symtable', '_thread', '_tracemalloc', '_warnings', '_weakref', 'atexit', 'builtins', 'errno', 'faulthandler', 'gc', 'itertools', 'marshal', 'posix', 'pwd', 'sys', 'time', 'xxsubtype')

os module has loaded the following os dependent module:

posix

Overview:

Example:

Output: