def __init__(self,filedir_feat,rawsize,imgsize,filedir_ali=None, load_ali=True, load_data=True):
        self.filedir_feat = filedir_feat
        self.rawsize = rawsize
        self.imgsize = imgsize
        if filedir_ali is None:
            self.filedir_ali = filedir_feat
        else:
            self.filedir_ali = filedir_ali
        self.load_ali = load_ali
        self.load_data = load_data
filedir_feat: directory for feature and key files
dataset/ETHPy150Open amaas/stanford-ctc/ctc_fast/dataLoader.py/DataLoader.__init__