human
I wrote the below code

    if ('retcode' not in __context__):
        __context__['retcode'] = 0
    def _error(msg):
        __context__['retcode'] = 1
        return msg
    if (chunk is None):
        try:
            os.makedirs(dest)
        except OSError as exc:
            if (exc.errno == errno.EEXIST):
                if os.path.isfile(dest):
                    return 'Path    exists    and    is    a    file'
            else:
                return _error(exc.__str__())
        return True
    chunk = base64.b64decode(chunk)
    open_mode = ('ab' if append else 'wb')
    try:
        fh_ = salt.utils.files.fopen(dest, open_mode)
    except (IOError, OSError) as exc:
        if (exc.errno != errno.ENOENT):
            return _error(exc.__str__())
        try:
            os.makedirs(os.path.dirname(dest))
        except (IOError, OSError) as makedirs_exc:
            return _error(makedirs_exc.__str__())
        fh_ = salt.utils.files.fopen(dest, open_mode)
    try:
        fh_.write((salt.utils.gzip_util.uncompress(chunk) if compressed else chunk))
    except (IOError, OSError) as exc:
        return _error(exc.__str__())
    else:
        if ((not append) and (mode is not None)):
            log.debug('Setting    mode    for    %s    to    %s', dest, mode)
            try:
                os.chmod(dest, mode)
            except OSError:
                return _error(exc.__str__())
        return True
    finally:
        try:
            fh_.close()
        except AttributeError:
            pass

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

def recv(dest, chunk, append=False, compressed=True, mode=None):