Hi,
On relfection, it's clear that:
1. the "(-a -b VALUE-B | -c -d VALUE-D)" syntax is not
implemented by the argparse module;
2. and get this syntax with "argparse + hacking" is not very clean.
So, finally I'll use the docopt module version 0.6.1.
For the inheritance of common options, I'll used something like
that (even if I prefer the oriented object side of the argparse
module):
[the main file]
#-----------------------------------
import importlib
import sys
from docopt import docopt
help_message ="""
Usage:
my-script (-h | --help)
my-script <command> [<args>...]
Options:
-h, --help
Show this help message and exit.
Available commands:
command1 Description1...
command2 Description2...
See 'my-script <command> -h' for more information on a specific command.
"""
if __name__ == '__main__':
args = docopt(help_message, options_first=True)
command = args['<command>']
try:
m = importlib.import_module('mymodule.' + command)
except ImportError:
print("Sorry, the %s command doesn't exist. See 'my-script -h'.") %
(command,)
sys.exit(1)
args = docopt(m.help_message, options_first=False)
m.run(args)
#-----------------------------------
[a file for each specific command, mymodule/command1.py etc.]
#-----------------------------------
import mymodule.common as common
help_message = """
Usage:
my-script subcommand1 (-h | --help)
my-script subcommand1 %s -w <warning> -c <critical>
Options:
%s
-w <warning>, --warning=<warning>
Some help.
-c <critical>, --critical=<critical>
Some help.
""" % (common.common_syntax, common.common_help,)
def run(args):
pass
#-----------------------------------
[and a file for the common syntax, mymodule/common.py]
#-----------------------------------
common_syntax = """-H <host-address> -t <timeout>
(--v2c -C <community> | -l <login> -x <passwd> -X <privpass> -L
<protocols>)"""
common_help = """ -h, --help
Show this help message and exit.
-H <host-address>, --host=<host-address>
Some help.
-t <timeout>, --timeout=<timeout>
Some help.
--v2c
Some help.
-C <community>, --community=<community>
Set the community password for SNMP V2c.
# etc.
# etc.
"""
#-----------------------------------
Thank you all.
--
François Lafont
--
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