def read_hexfile(infile="seed_drug_cid2fingerprint"):
    """ Read all the lines into a list. 

        First column as the cids, Second column as the hex string.
    """
    with open(infile,'r') as fr:
        cids = [x.strip().split()[0] for x in fr]
    with open(infile,'r') as fr:
        fps = [x.strip().split()[1] for x in fr]
    return cids, fps