Environment variables not visible from Python

[Ben Finney]

Steven D'Aprano <steve+comp.lang.python at pearwood.info> writes:

> I don't understand why some environment variables are not visible from 
> Python.

Not all variables are environment variables. Variables only become
environment variables if exported to the environment; the ‘export’
command is one way to do that.

-- 
 \       “As far as the laws of mathematics refer to reality, they are |
  `\    not certain, and as far as they are certain, they do not refer |
_o__)                              to reality.” —Albert Einstein, 1983 |
Ben Finney