Source Code for Module commons.environ

 1  # -*- mode: python; tab-width: 4; indent-tabs-mode: nil; py-indent-offset: 4; -*- 
 2  # vim:ft=python:et:sw=4:ts=4 
 3   
 4  """ 
 5  Environment variables. 
 6  """ 
 7   
 8  import os 
 9   
10 -def get_environs( *names ): 
11      """ 
12      Get the value from a prioritized ordering of environment 
13      variables. 
14       
15      @param names: The names of the environment variables to scan. 
16      @type names: str 
17   
18      @return: The value of the first variable that is set, or None if 
19      none are set. 
20      @rtype: str 
21      """ 
22      for name in names: 
23          try: 
24              return os.environ[ name ] 
25          except KeyError: 
26              pass 
27      else: 
28          return None 
29