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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 datetime_from_timestamp(timestamp, content):
 """ Helper function to add timezone information to datetime, so that datetime is comparable to other datetime objects in recent versions that now also have timezone information. """

    return set_date_tzinfo(
        datetime.fromtimestamp(timestamp),
        tz_name=content.settings.get('TIMEZONE', None))