python 编写命令行工具 用 argparse

#!/usr/bin/env python 
# -*- coding: utf-8 -*- 
# @Time : 2020/5/27 下午5:00 
# @Author : Jon
from __future__ import unicode_literals
from __future__ import print_function
import argparse
import socket

def parse_cmdargs(args=None, target=''):
    """
    Consume generic arguments from the start of the ``args``
    list.  Call this first to handle arguments that are not
    handled by a command description provided by the server.

    :returns: three tuple of ArgumentParser instance, Namespace instance
              containing parsed values, and list of un-handled arguments
    """
    # alias: let the line-wrapping be sane
    AP = argparse.ArgumentParser

    # format our own help

    parser = AP(description='ceph command tool', add_help=False)

    parser.add_argument('--completion', action='store_true',
                        help=argparse.SUPPRESS)

    parser.add_argument('-h', '--help', help='help -h or --help',
                        action='store_true')

    parser.add_argument('-osd', '--osd', dest='osd',
                        help='args json {ip:iplist, ...}')

    parser.add_argument('-mon', '--mon', dest='mon',
                        help='args json {ip:iplist, ...}')

    # returns a Namespace with the parsed args, and a list of all extras
    parsed_args, extras = parser.parse_known_args(args)

    return parser, parsed_args, extras



def _sendcmd_and_recv(ip='127.0.0.1', name=False):
    jsonargs = "{'test':'1'}"
    PORT = '8001'
    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

    try:
        s.connect((ip, PORT))
        s.sendall(jsonargs)
    except Exception, reason:
            logs.debug("send message to %s,%s" % (ip, reason))
            return False


def main():
    parser, parsed_args, childargs = parse_cmdargs()

    # print(parser, parsed_args, childargs)
    print('=========')

    if parsed_args.help:
        parser.print_help()
        print()
    if parsed_args.osd:
        print(parsed_args.osd)
    if parsed_args.mon:
        print(parsed_args.mon)




if __name__ == '__main__':
    main()