Perhaps try something like this? variables = ['a', 'b', 'c']
defaults = {
'a': 'c:\\programs',
'b': 'd:\\data',
# etc
}
try:
settings = dict([(v, os.environ.get(v, defaults[v])) for v in
variables])
except KeyError, k:
# handle missing variable
print "you have a problem with %s" % k.args[0]
# Now if you really must have these as independent variables
globals().update(settings)
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