Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!feeder.erje.net!eu.feeder.erje.net!xlned.com!feeder3.xlned.com!newsfeed.xs4all.nl!newsfeed1.news.xs4all.nl!xs4all!newsgate.cistron.nl!newsgate.news.xs4all.nl!post.news.xs4all.nl!not-for-mail Return-Path: X-Original-To: python-list@python.org Delivered-To: python-list@mail.python.org X-Spam-Status: OK 0.000 X-Spam-Evidence: '*H*': 1.00; '*S*': 0.00; 'python,': 0.02; 'url:pypi': 0.03; 'argument': 0.05; 'allowed.': 0.07; 'error:': 0.07; 'modify': 0.07; 'parser': 0.07; '__init__': 0.09; 'arguments': 0.09; 'option,': 0.09; 'works.': 0.09; 'subject:question': 0.10; 'python': 0.11; '2.7': 0.14; '"o"': 0.16; '"s"': 0.16; '**kwargs)': 0.16; '-o,': 0.16; '[name': 0.16; 'andy': 0.16; 'argument.': 0.16; 'boolean': 0.16; 'great!': 0.16; 'invoked.': 0.16; 'selected.': 0.16; 'supplied': 0.16; 'subject:python': 0.16; 'wrote:': 0.18; 'library': 0.18; 'all,': 0.19; 'command': 0.22; 'example': 0.22; '(in': 0.22; 'email addr:gmail.com>': 0.22; 'shell': 0.22; 'creating': 0.23; 'example.': 0.24; 'skip:\xa0 20': 0.24; 'unix/linux': 0.24; 'cheers,': 0.24; 'options': 0.25; 'script': 0.25; '>': 0.26; 'skip:" 30': 0.26; 'this:': 0.26; 'second': 0.26; 'defined': 0.27; 'tried': 0.27; 'point': 0.28; "doesn't": 0.30; 'direction': 0.30; 'programming.': 0.30; 'restrict': 0.30; 'message- id:@mail.gmail.com': 0.30; "i'm": 0.30; 'url:mailman': 0.30; 'code': 0.31; '8bit%:2': 0.31; 'restricted': 0.31; 'file': 0.32; 'figure': 0.32; 'option': 0.32; 'run': 0.32; 'url:python': 0.33; '(most': 0.33; 'third': 0.33; 'skip:_ 10': 0.34; 'could': 0.34; 'subject: (': 0.35; "can't": 0.35; 'but': 0.35; 'received:google.com': 0.35; 'add': 0.35; 'there': 0.35; 'options:': 0.36; 'url:listinfo': 0.36; 'thanks': 0.36; "i'll": 0.36; 'url:org': 0.36; 'should': 0.36; 'so,': 0.37; 'skip:o 20': 0.38; 'skip:& 10': 0.38; '8bit%:4': 0.38; 'url:library': 0.38; 'skip:[ 10': 0.38; 'to:addr:python-list': 0.38; 'recent': 0.39; 'skip:& 20': 0.39; 'does': 0.39; 'skip:. 10': 0.39; 'to:addr:python.org': 0.39; 'skip:p 20': 0.39; 'url:mail': 0.40; 'how': 0.40; 'read': 0.60; 'above,': 0.60; 'new': 0.61; 'first': 0.61; 'name': 0.63; 'more': 0.64; 'skip:r 40': 0.68; 'skip:r 30': 0.69; 'exclusive': 0.81; "'true'": 0.84; 'otten': 0.84; 'peter,': 0.84; 'skip:] 10': 0.84 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:from:date:message-id:subject:to:content-type; bh=FRb68uFUFbanc56T4xMFpDVOciIs1Jz+C6RaUZSUeQk=; b=Sj8eY+XS+aVKAmFZhnxrSuZ3Cw3Jc1fYhNaFzasQFkUjY05/blflj/4r10F0uJQmEV /x4tjY/UmtiOCiV2rIeTqGpK4N28yl4Smi4TNuld4MyM1RkOVfChTFmVxFibEy61Uo8O izQpV9xJFT+1fJVz/+DViwokUET/pxiRdMrvSTuvah7FXNdDVYz2+pNJnimEqDqOgGcx URL2Tuf3tpN4BHk95mvEylMJop1PC+0Rq1TPlnONK4HmWV++xa0M+NUmCKBpEuOoNI0w ncjDYtp133o+9QFqQWuX5h7AoIGHt0nkKegvlz5u7jqJpd6z/pKIL7Mftm935xBKBgqQ 3uiQ== X-Received: by 10.66.186.12 with SMTP id fg12mr2611323pac.178.1378131685056; Mon, 02 Sep 2013 07:21:25 -0700 (PDT) MIME-Version: 1.0 From: Andy Kannberg Date: Mon, 2 Sep 2013 16:21:03 +0200 Subject: Re: optparse question (python 2.6) To: python-list@python.org Content-Type: multipart/alternative; boundary=047d7bf0e4268aae5404e567497a X-Mailman-Approved-At: Mon, 02 Sep 2013 16:26:53 +0200 X-BeenThere: python-list@python.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: General discussion list for the Python programming language List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Newsgroups: comp.lang.python Message-ID: Lines: 280 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1378132014 news.xs4all.nl 15926 [2001:888:2000:d::a6]:41305 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:53484 --047d7bf0e4268aae5404e567497a Content-Type: text/plain; charset=ISO-8859-1 Hi all, I tried with the example Peter gave me, and it works. But only when the options are boolean. At least, that is my conclusion with experimenting. I'll elaborate: The code to create 'mutually exclusive options': option_names = [ "l", "o" , "s" ] toggled_options = [name for name in option_names if getattr(opts, name)] if len(toggled_options) > 1: s = repr(toggled_options).strip("[]") parser.error("options %s are mutually exclusive" % s) The options: parser = optparse.OptionParser() parser.add_option('-l', help='Show optionset list', dest='l', action='store_true' ) parser.add_option('-o', help='Show content of optionset ', dest='o', action='store') parser.add_option('-s', help='Set optionset for a host', dest='s', action='store' , nargs=2) The first option, -l, doesn't require an argument The second option, -o, does require one argument. The third option, -s does require 2 arguments. I need to add 4 more options, which all need one or more arguments. Now, when I run the program with the options defined as above, everything works, except, the 'mutually exclusive' part. Because only the -l option is set to 'true' when selected. When I modify the options to this: parser = optparse.OptionParser() parser.add_option('-l', help='Show optionset list', dest='l', action='store_true' ) parser.add_option('-o', help='Show content of optionset ', dest='o', action='store_true') parser.add_option('-s', help='Set optionset for a host', dest='s', action='store_true' , nargs=2) I get this error: # ./listopt3.py -o -l Traceback (most recent call last): File "./listopt3.py", line 8, in parser.add_option('-s', help='Set optionset for a host', dest='s', action='store_true' , nargs=2) File "/usr/lib64/python2.6/optparse.py", line 1012, in add_option option = self.option_class(*args, **kwargs) File "/usr/lib64/python2.6/optparse.py", line 577, in __init__ checker(self) File "/usr/lib64/python2.6/optparse.py", line 706, in _check_nargs self) optparse.OptionError: option -s: 'nargs' must not be supplied for action 'store_true' So, apparanly, using boolean AND arguments isn't allowed. I'm still learning Python, so if someone can point me in the right direction would be great! cheers, Andy 2013/8/27 Andy Kannberg > Hello Peter, > > Thanks for the example. For now I am restricted to Python 2.6, so no > argparse for me at the moment. > > cheers, > Andy > > > 2013/8/26 Peter Otten <__peter__@web.de> > >> Andy Kannberg wrote: >> >> > Hi python-guru's, >> > >> > I am new to Python, coming from a long history of Unix/linux shell >> > programming. >> > I am creating a Python script (In Python 2.6) which should be able to >> > read command line options and arguments. >> > So far, I figured out how to do that with optparse. I can add options >> (and >> > arguments ) . >> > There are about 7 options that can be selected. >> > >> > However, I can't seem to figure out how to force that only one option is >> > allowed when the script is invoked. In other words: How to restrict the >> > script to accept only one of the available options ? >> >> You have to do it manually, like in the example >> >> >> http://docs.python.org/2.6/library/optparse.html#how-optparse-handles-errors >> >> if options.a and options.b: >> parser.error("options -a and -b are mutually exclusive") >> >> which could be generalized to (untested) >> >> option_names = ["foo", "bar", "baz", ...] >> toggled_options = [name for name in option_names if getattr(options, >> name)] >> if len(toggled_options) > 1: >> s = repr(toggled_options).strip("[]") >> parser.error("options %s are mutually exclusive" % s) >> >> If you are not restricted to the standard library use >> >> https://pypi.python.org/pypi/argparse >> >> which was added to the stdlib in 2.7 and has "mutually exclusive groups", >> see >> >> http://docs.python.org/2/library/argparse.html#mutual-exclusion >> >> -- >> http://mail.python.org/mailman/listinfo/python-list >> > > --047d7bf0e4268aae5404e567497a Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
Hi all,

I tried with the example Peter = gave me, and it works. But only when the options are boolean. At least, tha= t is my conclusion with experimenting. I'll elaborate:

The code to create 'mutually exclusive options':
option_names =3D =A0[ "l", =A0"o" , &q= uot;s" ]
toggled_options =3D [name for name in option_names = if getattr(opts, name)]
if len(toggled_options) > 1:
=A0 s =3D repr(toggled_optio= ns).strip("[]")
=A0 parser.error("options %s are m= utually exclusive" % s)

The options:

parser =3D optparse.OptionParser()
parse= r.add_option('-l', help=3D'Show optionset list', =A0dest=3D= 'l', action=3D'store_true' =A0)
parser.add_option= ('-o', help=3D'Show content of optionset ', dest=3D'o&#= 39;, action=3D'store')
parser.add_option('-s', help=3D'Set optionset for a host&#= 39;, dest=3D's', action=3D'store' , nargs=3D2)
<= div>
The first option, -l, doesn't require an argument
The second option, -o, does require one argument.
The third optio= n, -s does require 2 arguments.

I need to add 4 mo= re options, which all need one or more arguments.=A0

Now, when I run the program with the =A0options defined as above, ever= ything works, except, the 'mutually exclusive' part. Because only t= he -l option is set to 'true' when selected. When I modify the opti= ons to this:

parser =3D optparse.OptionParser()
parse= r.add_option('-l', help=3D'Show optionset list', =A0dest=3D= 'l', action=3D'store_true' =A0)
parser.add_option= ('-o', help=3D'Show content of optionset ', dest=3D'o&#= 39;, action=3D'store_true')
parser.add_option('-s', help=3D'Set optionset for a host&#= 39;, dest=3D's', action=3D'store_true' , nargs=3D2)

I get this error:

# .= /listopt3.py -o -l
Traceback (most recent call last):
=A0 File "./listopt3= .py", line 8, in <module>
=A0 =A0 parser.add_option(&#= 39;-s', help=3D'Set optionset for a host', dest=3D's', = action=3D'store_true' , nargs=3D2)
=A0 File "/usr/lib64/python2.6/optparse.py", line 1012, in a= dd_option
=A0 =A0 option =3D self.option_class(*args, **kwargs)
=A0 File "/usr/lib64/python2.6/optparse.py", line 577, i= n __init__
=A0 =A0 checker(self)
=A0 File "/usr/lib64/python2.6/op= tparse.py", line 706, in _check_nargs
=A0 =A0 self)
optparse.OptionError: option -s: 'nargs' must not be supplied for= action 'store_true'

So, apparanly, using boolean AND arguments isn= 9;t allowed.=A0
I'm still learning Python, so if someone can = point me in the right direction would be great!

cheers,
Andy


2013/8/27 Andy Kannberg <andy.kannberg@gmail.com>= ;
Hello Peter,

Thanks fo= r the example. For now I am restricted to Python 2.6, so no argparse for me= at the moment.=A0

cheers,
Andy


2013/8/26 Peter Otten = <__peter__@web.de<= /a>>
Andy Kannberg wrote:

> Hi python-guru's,
>
> I am new to Python, coming from a long history of Unix/linux shell
> programming.
> I am creating a Python script (In Python 2.6) =A0which should be able = to
> read command line options and arguments.
> So far, I figured out how to do that with optparse. I can add options = (and
> arguments ) .
> There are about 7 options that can be selected.
>
> However, I can't seem to figure out how to force that only one opt= ion is
> allowed when the script is invoked. In other words: How to restrict th= e
> script to accept only one of the available options ?

You have to do it manually, like in the example

http://docs.python.org/2.6/library/optparse= .html#how-optparse-handles-errors

if options.a and options.b:
=A0 =A0 parser.error("options -a and -b are mutually exclusive")<= br>
which could be generalized to (untested)

option_names =3D ["foo", "bar", "baz", ...] toggled_options =3D [name for name in option_names if getattr(options, name= )]
if len(toggled_options) > 1:
=A0 =A0 s =3D repr(toggled_options).strip("[]")
=A0 =A0 parser.error("options %s are mutually exclusive" % s)

If you are not restricted to the standard library use

https:/= /pypi.python.org/pypi/argparse

which was added to the stdlib in 2.7 and has "mutually exclusive group= s",
see

http://docs.python.org/2/library/argparse.html#mutual-ex= clusion

--
http://mail.python.org/mailman/listinfo/python-list


--047d7bf0e4268aae5404e567497a--