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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def get_rule_handle(table='filter', chain=None, rule=None, family='ipv4'):
    '''
    Get the handle for a particular rule

    This function accepts a rule in a standard nftables command format,
        starting with the chain. Trying to force users to adapt to a new
        method of creating rules would be irritating at best, and we
        already have a parser that can handle it.

    CLI Example:

    .. code-block:: bash

        salt '*' nftables.get_rule_handle filter input \\
            rule='tcp dport 22 log accept'

        IPv6:
        salt '*' nftables.get_rule_handle filter input \\
            rule='tcp dport 22 log accept' \\
            family=ipv6
    '''
    ret = {'comment': '',
           'result': False}

    if not chain:
        ret['comment'] = 'Chain needs to be specified'
        return ret

    if not rule:
        ret['comment'] = 'Rule needs to be specified'
        return ret

    res = check_table(table, family=family)
    if not res['result']:
        return res

    res = check_chain(table, chain, family=family)
    if not res['result']:
        return res

    res = check(table, chain, rule, family=family)
    if not res['result']:
        return res

    nft_family = _NFTABLES_FAMILIES[family]
    cmd = '{0} --numeric --numeric --numeric --handle list chain {1} {2} {3}'.\
        format(_nftables_cmd(), nft_family, table, chain)
    out = __salt__['cmd.run'](cmd, python_shell=False)
    rules = re.split('\n+', out)

    pat = re.compile(r'{0} # handle (?P<handle>\d+)'.format(rule))
    for r in rules:
        match = pat.search(r)
        if match:
            return {'result': True, 'handle': match.group('handle')}
    return {'result': False,
            'comment': 'Could not find rule {0}'.format(rule)}