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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_balancers(profile, **libcloud_kwargs):
    '''
    Return a list of load balancers.

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

    :param libcloud_kwargs: Extra arguments for the driver's list_balancers method
    :type  libcloud_kwargs: ``dict``

    CLI Example:

    .. code-block:: bash

        salt myminion libcloud_storage.list_balancers profile1
    '''
    conn = _get_driver(profile=profile)
    libcloud_kwargs = salt.utils.args.clean_kwargs(**libcloud_kwargs)
    balancers = conn.list_balancers(**libcloud_kwargs)
    ret = []
    for balancer in balancers:
        ret.append(_simple_balancer(balancer))
    return ret