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47 lines
1.7 KiB
Python
47 lines
1.7 KiB
Python
# module getopt -- Standard command line processing.
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# Function getopt.getopt() has a different interface but provides the
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# same functionality as the Unix getopt() function.
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# It has two arguments: the first should be argv[1:] (it doesn't want
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# the script name), the second the string of option letters as passed
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# to Unix getopt() (i.e., a string of allowable option letters, with
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# options requiring an argument followed by a colon).
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# It raises the exception getopt.error with a string argument if it
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# detects an error.
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# It returns two items:
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# (1) a list of pairs (option, option_argument) giving the options in
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# the order in which they were specified. (I'd use a dictionary
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# but applications may depend on option order or multiple
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# occurrences.) Boolean options have '' as option_argument.
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# (2) the list of remaining arguments (may be empty).
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error = 'getopt error'
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def getopt(args, options):
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list = []
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while args and args[0][:1] == '-' and args[0] <> '-':
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if args[0] == '--':
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args = args[1:]
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break
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optstring, args = args[0][1:], args[1:]
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while optstring <> '':
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opt, optstring = optstring[0], optstring[1:]
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if classify(opt, options): # May raise exception as well
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if optstring == '':
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if not args:
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raise error, 'option -' + opt + ' requires argument'
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optstring, args = args[0], args[1:]
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optarg, optstring = optstring, ''
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else:
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optarg = ''
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list.append('-' + opt, optarg)
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return list, args
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def classify(opt, options): # Helper to check type of option
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for i in range(len(options)):
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if opt == options[i] <> ':':
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return options[i+1:i+2] == ':'
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raise error, 'option -' + opt + ' not recognized'
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