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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 reload_localzone():
 """Reload the cached localzone. You need to call this if the timezone has changed."""

    global _cache_tz
    _cache_tz = pytz.timezone(get_localzone_name())
    utils.assert_tz_offset(_cache_tz)
    return _cache_tz