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Author v+python
Recipients v+python
Date 2014-06-05.04:25:01
SpamBayes Score -1.0
Marked as misclassified Yes
Message-id <>
I coded up a new program, with a bunch of options, and got the following traceback when I tried to run it:

Traceback (most recent call last):
  File "D:\my\py\", line 273, in <module>
    args = cmdl.parse_intermixed_args()
  File "D:\my\py\glu\", line 1695, in parse_intermixed_args
    args, argv = self.parse_known_intermixed_args(args, namespace)
  File "D:\my\py\glu\", line 1740, in parse_known_intermixed_args
    namespace, remaining_args = self.parse_known_args(args, namespace)
  File "C:\Python33\lib\", line 1737, in parse_known_args
    namespace, args = self._parse_known_args(args, namespace)
  File "C:\Python33\lib\", line 1943, in _parse_known_args
    start_index = consume_optional(start_index)
  File "C:\Python33\lib\", line 1883, in consume_optional
    take_action(action, args, option_string)
  File "C:\Python33\lib\", line 1811, in take_action
    action(self, namespace, argument_values, option_string)
  File "C:\Python33\lib\", line 1015, in __call__
  File "C:\Python33\lib\", line 2339, in print_help
    self._print_message(self.format_help(), file)
  File "C:\Python33\lib\", line 2323, in format_help
    return formatter.format_help()
  File "C:\Python33\lib\", line 276, in format_help
    help = self._root_section.format_help()
  File "C:\Python33\lib\", line 206, in format_help
  File "C:\Python33\lib\", line 206, in format_help
  File "C:\Python33\lib\", line 513, in _format_action
    help_text = self._expand_help(action)
  File "C:\Python33\lib\", line 600, in _expand_help
    return self._get_help_string(action) % params
ValueError: unsupported format character ')' (0x29) at index 673

The only thing I can tell is that something went wrong in ArgParse. I had called a bunch of add_argument, and then a parse_known_args. I had passed parameters to the program to get a help message, so that is what I expect parse_known_args is trying to produce... and the call stack seems to confirm that. I didn't intentionally pass a format character ')' anywhere, but there are ')' characters in some of my help messages, so that is probably the source of the problem. 

No doubt I can reduce the problem space by judiciously commenting out things until I can isolate the particular help message that is causing the failure (it may be more than one as several are similar). But it seems like the exception should include the name of the argument for which the failure occurred.

[OK, I isolated, and found a "%)" sequence in one of my messages that should have been "%%)". So this is not terribly urgent, just poor reporting.]
Date User Action Args
2014-06-05 04:25:09v+pythonsetrecipients: + v+python
2014-06-05 04:25:08v+pythonsetmessageid: <>
2014-06-05 04:25:08v+pythonlinkissue21666 messages
2014-06-05 04:25:01v+pythoncreate