python访问系统环境变量的方法

#--------------------------------
# Name: enviroment_variables.py
# Author: Kevin Harris
# Last Modified: 02/13/04
# Description: This Python script demonstrates 
# how to acces enviroment variables.
#--------------------------------
import os
envVar = os.environ.get( "PATHEXT" )
print( "PATHEXT = " + envVar )
input( '
Press Enter to exit...' )