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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 list_zones(profile):
    '''
    List zones for the given profile

    :param profile: The profile key
    :type  profile: ``str``

    CLI Example:

    .. code-block:: bash

        salt myminion libcloud_dns.list_zones profile1
    '''
    conn = _get_driver(profile=profile)
    return [_simple_zone(zone) for zone in conn.list_zones()]