import glob

path = 'scores/model.iter*.npz.bleu'

    for file in glob(path):
          with open(file, 'r') as f:
            for line in f.readlines():
            num = float(line[line.find("=")+1:line.find(",")])

             if num > 0:
                max_num = num
                max_num_file = file

             file.close()

print(max_num_file)