# os.environ
import os
for key in os.environ.keys():
print '%s = %s' %
(key, os.environ[key])
p = os.path.join(os.environ['USERPROFILE'], 'Desktop')
if os.path.isdir(p):
print "\nPath '%s' is valid" % (p)
else:
print "\nInvalid path"
# Partial Output
"""
...............
HOMEDRIVE = C:
OS = Windows_NT
SYSTEMDRIVE = C:
NUMBER_OF_PROCESSORS
= 1
PROCESSOR_LEVEL = 15
__COMPAT_LAYER = EnableNXShowUI
USERPROFILE =
C:\Documents and Settings\Bruce H. Vaughan
Path 'C:\Documents and Settings\Bruce H. Vaughan\Desktop' is valid
>>>
"""