How to use the py3status.constants.TIME_FORMAT function in py3status

try:
            # python3 compatibility code
            i3s_time = i3s_time.decode()
        except:  # noqa e722
            pass

        # get datetime and time zone info
        parts = i3s_time.split()
        i3s_datetime = " ".join(parts[:2])
        # occasionally we do not get the timezone name
        if len(parts) < 3:
            return True
        else:
            i3s_time_tz = parts[2]

        date = datetime.strptime(i3s_datetime, TIME_FORMAT)
        # calculate the time delta
        utcnow = datetime.utcnow()
        delta = datetime(
            date.year, date.month, date.day, date.hour, date.minute
        ) - datetime(utcnow.year, utcnow.month, utcnow.day, utcnow.hour, utcnow.minute)
        # create our custom timezone
        try:
            self.tz = Tz(i3s_time_tz, delta)
        except ValueError:
            return False
        return True

config["order"].append(name)
        add_container_items(name)
        append_modules(name)

        config[name] = remove_any_contained_modules(module)

    config["on_click"] = on_click
    config["i3s_modules"] = i3s_modules
    config["py3_modules"] = py3_modules
    config[".module_groups"] = module_groups

    # time and tztime modules need a format for correct processing
    for name in config:
        if name.split()[0] in TIME_MODULES and "format" not in config[name]:
            if name.split()[0] == "time":
                config[name]["format"] = TIME_FORMAT
            else:
                config[name]["format"] = TZTIME_FORMAT

    if not config["order"]:
        notify_user(
            "Your configuration file does not list any module"
            ' to be loaded with the "order" directive.'
        )
    return config

def set_time_format(self):
        config = self.i3status.py3_config.get(self.module_name, {})
        time_format = config.get("format", TIME_FORMAT)
        # Handle format_time parameter if exists
        # Not sure if i3status supports this but docs say it does
        if "format_time" in config:
            time_format = time_format.replace("%time", config["format_time"])
        self.time_format = time_format