home *** CD-ROM | disk | FTP | other *** search
Text File | 1992-01-09 | 1.7 KB | 48 lines | [TEXT/R*ch] |
- # module getopt -- Standard command line processing.
-
- # Function getopt.getopt() has a different interface but provides the
- # same functionality as the Unix getopt() function.
-
- # It has two arguments: the first should be argv[1:] (it doesn't want
- # the script name), the second the string of option letters as passed
- # to Unix getopt() (i.e., a string of allowable option letters, with
- # options requiring an argument followed by a colon).
-
- # It raises the exception getopt.error with a string argument if it
- # detects an error.
-
- # It returns two items:
- # (1) a list of pairs (option, option_argument) giving the options in
- # the order in which they were specified. (I'd use a dictionary
- # but applications may depend on option order or multiple
- # occurrences.) Boolean options have '' as option_argument.
- # (2) the list of remaining arguments (may be empty).
-
- error = 'getopt error'
-
- def getopt(args, options):
- list = []
- while args and args[0][:1] == '-' and args[0] <> '-':
- if args[0] == '--':
- args = args[1:]
- break
- optstring, args = args[0][1:], args[1:]
- while optstring <> '':
- opt, optstring = optstring[0], optstring[1:]
- if classify(opt, options): # May raise exception as well
- if optstring == '':
- if not args:
- raise error, 'option -' + opt + ' requires argument'
- optstring, args = args[0], args[1:]
- optarg, optstring = optstring, ''
- else:
- optarg = ''
- list.append('-' + opt, optarg)
- return list, args
-
- def classify(opt, options): # Helper to check type of option
- for i in range(len(options)):
- if opt == options[i] <> ':':
- return options[i+1:i+2] == ':'
- raise error, 'option -' + opt + ' not recognized'
-