Python Module os

External

• https://docs.python.org/3/library/os.html#module-os

Internal

• Python Language | Standard Library
• shutil

Environment Variables

To get an environment variable:

import os

print(os.environ.get('HOME'))

If the environment variable does not exist, the call will get None

To set an environment variable:

import os
os.environ['MY_VAR'] = 'myvalue'

This works for testing. It does not change the value of the corresponding environment variable, if it exists, or it does not set a new one, if it doesn't, in the environment that calls the python interpreter.

Working Directory

File Operations in Python | Working Directory