human
I wrote the below code

    def _match(target, pattern, regex_match=False, exact_match=False):
        if regex_match:
            try:
                return re.match(pattern.lower(), str(target).lower())
            except Exception:
                log.error("Invalid    regex    '{0}'    in    match".format(pattern))
                return False
        elif exact_match:
            return (str(target).lower() == pattern.lower())
        else:
            return fnmatch.fnmatch(str(target).lower(), pattern.lower())
    def _dict_match(target, pattern, regex_match=False, exact_match=False):
        wildcard = pattern.startswith('*:')
        if wildcard:
            pattern = pattern[2:]
        if (pattern == '*'):
            return True
        elif (pattern in target):
            return True
        elif subdict_match(target, pattern, regex_match=regex_match, exact_match=exact_match):
            return True
        if wildcard:
            for key in target:
                if _match(key, pattern, regex_match=regex_match, exact_match=exact_match):
                    return True
                if isinstance(target[key], dict):
                    if _dict_match(target[key], pattern, regex_match=regex_match, exact_match=exact_match):
                        return True
                elif isinstance(target[key], list):
                    for item in target[key]:
                        if _match(item, pattern, regex_match=regex_match, exact_match=exact_match):
                            return True
        return False
    for idx in range(1, (expr.count(delimiter) + 1)):
        splits = expr.split(delimiter)
        key = delimiter.join(splits[:idx])
        matchstr = delimiter.join(splits[idx:])
        log.debug("Attempting    to    match    '{0}'    in    '{1}'    using    delimiter    '{2}'".format(matchstr, key, delimiter))
        match = traverse_dict_and_list(data, key, {}, delimiter=delimiter)
        if (match == {}):
            continue
        if isinstance(match, dict):
            if _dict_match(match,...

What's a good function header?

=====
Here's a good function header?
assistant
#Here's a good function header.

def subdict_match(data, expr, delimiter=DEFAULT_TARGET_DELIM, regex_match=False, exact_match=False):