optparser: how to register callback to display binary's help

[hiral]

On Oct 13, 6:03 pm, Jean-Michel Pichavant <jeanmic... at sequans.com>
wrote:
> hiral wrote:
> > Hi,
>
> > I want to display help message of python script and then display help
> > message from the binary file (which also supports -h option):
>
> > Assumptions:
> > 1) 'mybinary' - is linux executable file which supports '-h' and on '-
> > h' option it displays the help message
> > 2) myscript.py - when passing '-h' option want to call 'mybinary -h'
> > and display help messages of both script and binary.
>
> > Code:
> > ====
> > from optparse import OptionParser
> > [...]
> > parser = OptionParser()
> > parser.add_option("-e", "--execute", dest="file",
> >                   help="Execute binary", metavar="FILE")
> > (options, args) = parser.parse_args()
> > if options.file:
> >     subprocess.call(options.file)
>
> > Requirement:
> > $ python myscript.py -h
> > <currently it prints the help message with '-e' and '-h' help message>
> > <becides I want to display help message of 'mybinary'>
>
> > Thank you in advance.
> > -Hiral
>
> Hi,
>
> Try something like
>
> def myHelp(option, opt, value, parser):
>     parser.print_help()
>     if hasattr(parser.values, 'file') and parser.values.file:
>         proc = subprocess.Popen([parser.values.file, '-h'],
> stdout=subprocess.PIPE, stderr=subprocess.PIPE)
>         print proc.stdout.read()
>         print proc.stderr.read()
>
> parser.remove_option('-h')
> parser.add_option("-h", "--help",
>                   help="display the help message", action='callback',
> callback = myHelp)
>
> Jean-Michel- Hide quoted text -
>
> - Show quoted text -

Hi Jean-Michel,

It helped !!!

Thank you.
-Hiral