Getopt: Using Environment Var To Override
Skip Montanaro
skip at pobox.com
Fri Jan 3 20:51:07 EST 2003
Tim> I currently use getopt to process my command line args. Is there
Tim> some standard/easy/idiomatic/Pythonic way to supplement this with
Tim> an environment variable?
None that I'm aware of, however depending on how your environment variable
is formatted it might be trivial tack it onto the front or back of the args
you pass to getopt. Suppose you require your environment variable value to
look like a set of arguments. It could be as simple as
envargs = os.environ.get("MYENV")
if envargs is not None:
opts, args = getopt.getopt(envargs.split(), ...)
for opt, arg in opts:
...
if args:
handle error?
then later,
opts, args = getopt.getopt(sys.argv[1:], ...)
for opt, arg in opts:
...
if args:
process parameters
(Based upon the 1, 2, 3 you gave, I think you want to process environment
variables before the command line.)
Skip
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