Python 0.9.1 as posted in alt.sources

1 files changed, 47 insertions, 0 deletions

diff --git a/lib/getopt.py b/lib/getopt.py
new file mode 100644
index 0000000..f343c22
--- /dev/null
+++ b/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'