Strange python non blocking error message while using pyslurm.node() nodes.get() about pyslurm HOT 7 CLOSED

extern int select_p_select_nodeinfo_get(select_nodeinfo_t *nodeinfo,
                    enum select_nodedata_type dinfo,
                    enum node_states state,
                    void *data)
{
    int rc = SLURM_SUCCESS;
    uint16_t *uint16 = (uint16_t *) data;
    char **tmp_char = (char **) data;
    select_nodeinfo_t **select_nodeinfo = (select_nodeinfo_t **) data;

    if (nodeinfo == NULL) {
        error("get_nodeinfo: nodeinfo not set");
        return SLURM_ERROR;
    }

    if (nodeinfo->magic != NODEINFO_MAGIC) {
        error("get_nodeinfo: nodeinfo magic bad");
        return SLURM_ERROR;
    }

    switch (dinfo) {
    case SELECT_NODEDATA_SUBGRP_SIZE:
        *uint16 = 0;
        break;
    case SELECT_NODEDATA_SUBCNT:
        if (state == NODE_STATE_ALLOCATED)
            *uint16 = nodeinfo->alloc_cpus;
        else
            *uint16 = 0;
        break;
    case SELECT_NODEDATA_PTR:
        *select_nodeinfo = nodeinfo;
        break;
    case SELECT_NODEDATA_RACK_MP:
    case SELECT_NODEDATA_EXTRA_INFO:
        *tmp_char = NULL;
        break;
    default:
        error("Unsupported option %d for get_nodeinfo.", dinfo);
        rc = SLURM_ERROR;
        break;
    }
    return rc;

enum select_nodedata_type {
    SELECT_NODEDATA_BITMAP_SIZE, /* data-> uint16_t */
    SELECT_NODEDATA_SUBGRP_SIZE, /* data-> uint16_t */
    SELECT_NODEDATA_SUBCNT,      /* data-> uint16_t */
    SELECT_NODEDATA_BITMAP,      /* data-> bitstr_t * needs to be
                      * freed with FREE_NULL_BITMAP */
    SELECT_NODEDATA_STR,         /* data-> char *  needs to be
                      * freed with xfree */
    SELECT_NODEDATA_PTR,         /* data-> select_nodeinfo_t *nodeinfo */
    SELECT_NODEDATA_EXTRA_INFO,  /* data-> char *  needs to be
                      * freed with xfree */
    SELECT_NODEDATA_RACK_MP,     /* data-> char * needs to be
                      * freed with xfree */
};