read a CSV file (ref_classes.csv) and return the 
    list of names

def read_file(fname):
    """
    read a CSV file (ref_classes.csv) and return the 
    list of names
    """
    print("NO - dont use this function read_file(fname):")
    exit(1)
    lst = []
    with open(fname, 'r') as f:
        #hdr = f.readline()
        for line in f:
            lst.append(line.strip('\n'))
    return lst