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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 capabilities(**kwargs):
    '''
    Return the hypervisor connection capabilities.

    :param connection: libvirt connection URI, overriding defaults
    :param username: username to connect with, overriding defaults
    :param password: password to connect with, overriding defaults

    .. versionadded:: 2019.2.0

    CLI Example:

    .. code-block:: bash

        salt '*' virt.capabilities
    '''
    conn = __get_conn(**kwargs)
    caps = ElementTree.fromstring(conn.getCapabilities())
    conn.close()

    return {
        'host': _parse_caps_host(caps.find('host')),
        'guests': [_parse_caps_guest(guest) for guest in caps.findall('guest')]
    }