Initial revision

Lib/getopt.py

@@ -0,0 +1,47 @@
+# 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][0] = '-' 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'