Is it possible to distinguish between system environment variablesand the user ones?

[could ildg]

To a environment variable in Windows, can python know if it is a
system environment
variable or a current-user environment variable?
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[Peter Hansen]

could ildg wrote:

To a environment variable in Windows, can python know if it is a
system environment
variable or a current-user environment variable?

Not just by using the "os.environ " approach.
You would have to resort to the "pywin32"
extensions. Check the Python Cookbook using
Google for "environmen t variable" recipes and
you'll get a good start on it.

You'll also require a bit of Win32-specific
knowledge, since this entire concept is not
a cross-platform one.

-Peter

[Kartic]

There is nothing that plainly differentiates whether an environment
variable is the system's or the current user's.

What you could do is:
1. Get the list of environment variables for the user the script is
executing as.
2. Use the pywin32 extensions to access the registry key
HKCU\Environmen t
3. Lookup the environment variables present in the list (Item 1) that
appear as string values under HKCU\Environmen t.
4. The intersecting list belongs to the user, the rest can be surmised
as belonging to the system environment.

Thanks,
--Kartic