gistfile1.txt

for key in d.keys():   
    acc = ''
    gi = 0  
    taxonfaa=None
    homolo = None
    for sublst in d[key]:
        if 'NP' in sublst[3]:
            if sublst[2] > gi:
                acc = sublst[3]
                gi = sublst[2]
                taxonfaa = sublst[0]
                homolo = sublst[1]
    if acc=='':
        for sublst in d[key]:
            if 'XP' in sublst[3]:
                if sublst[2] > gi:
                    acc = sublst[3]
                    gi = sublst[2]   
                    taxonfaa = sublst[0]
                    homolo = sublst[1]                    
    outfile.write(str(taxonfaa) + '\t' + str(homolo) + str(gi) + '\t' + key)