How to use the tzlocal.helpers._get_timezone function in tzlocal

def reload_localzone():
    """Reload the cached localzone. You need to call this if the timezone has changed."""
    global _cache_tz
    _cache_tz = _get_timezone(get_localzone_name())

def get_localzone():
    """Returns the zoneinfo-based tzinfo object that matches the Windows-configured timezone."""
    global _cache_tz
    if _cache_tz is None:
        _cache_tz = _get_timezone(get_localzone_name())
    return _cache_tz