def cmpcvr_by_one_tasklist(argsdict, tasklist_name):
    """ This is the primary function to be run inside lambda for cmpcvr.
    
        tasklist_name is like "{archive_root}_chunk_{chunk_idx}"
    """
    # set s3 vs local mode -- this probably better done long before this point.
    DB.set_DB_mode()        

    contests_dod = DB.load_data('styles', 'contests_dod.json')
    if CVR.data_frame.empty:
        CVR.load_cvrs_to_df(argsdict)
    
    #        marks/chunks/{archive_root}_chunk_{chunk_idx}.csv           # individual marks chunks. These are kept for cmpcvr


    if not DB.file_exists(file_name=tasklist_name+'.csv', dirname='marks', subdir="chunks"):
        utils.sts(f"Logic Error: no marks df missing: {tasklist_name}")
        traceback.print_stack()
        sys.exit(1)

    audit_df = DB.load_data(dirname='marks', subdir="chunks", name=tasklist_name, format='.csv')
    
    #---------------------------------------
    # primary call of this function performs chunk comparison
    
    overvotes_results, disagreed_results, blank_results = compare_chunk_with_cvr(
        argsdict=argsdict,
        contests_dod=contests_dod,
        cvr_df=CVR.data_frame,
        audit_df=audit_df,
        chunk_name=tasklist_name,
        )
    #---------------------------------------
    """
        cmpcvr/chunks/disagreed_{archive_root}_chunk_{chunk_idx}.csv    # individual cmpcvr disagreed chunks
        cmpcvr/chunks/overvotes_{archive_root}_chunk_{chunk_idx}.csv    # individual cmpcvr overvote chunks
    """
        
       
    DB.save_data(data_item=disagreed_results, 
        dirname='cmpcvr', subdir='chunks', 
        name=f"disagreed-{tasklist_name}.csv")

    DB.save_data(data_item=disagreed_results, 
        dirname='cmpcvr', subdir='chunks', 
        name=f"overvotes-{tasklist_name}.csv")

    DB.save_data(data_item=blank_results, 
        dirname='cmpcvr', subdir='chunks', 
        name=f"blanks-{tasklist_name}.csv")
def is_dirname_chunk_built(dirname, group_name, chunk_idx: int, s3flag=None):
    file_name = create_dirname_chunk_filename(dirname, group_name, chunk_idx)
    return DB.file_exists(file_name, dirname, subdir='chunks', s3flag=s3flag)