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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 image_present(name):
    '''
    Ensure image is present on the computenode

    name : string
        uuid of image
    '''
    ret = {'name': name,
           'changes': {},
           'result': None,
           'comment': ''}

    if _is_docker_uuid(name) and __salt__['imgadm.docker_to_uuid'](name):
        # docker image was imported
        ret['result'] = True
        ret['comment'] = 'image {0} ({1}) is present'.format(
            name,
            __salt__['imgadm.docker_to_uuid'](name),
        )
    elif name in __salt__['imgadm.list']():
        # image was already imported
        ret['result'] = True
        ret['comment'] = 'image {0} is present'.format(name)
    else:
        # add image
        if _is_docker_uuid(name):
            # NOTE: we cannot query available docker images
            available_images = [name]
        else:
            available_images = __salt__['imgadm.avail']()

        if name in available_images:
            if __opts__['test']:
                ret['result'] = True
                res = {}
                if _is_docker_uuid(name):
                    res['00000000-0000-0000-0000-000000000000'] = name
                else:
                    res[name] = available_images[name]
            else:
                res = __salt__['imgadm.import'](name)
                if _is_uuid(name):
                    ret['result'] = (name in res)
                elif _is_docker_uuid(name):
                    ret['result'] = __salt__['imgadm.docker_to_uuid'](name) is not None
            if ret['result']:
                ret['comment'] = 'image {0} imported'.format(name)
                ret['changes'] = res
            else:
                ret['comment'] = 'image {0} was unable to be imported'.format(name)
        else:
            ret['result'] = False
            ret['comment'] = 'image {0} does not exists'.format(name)

    return ret