def __getitem__(self, key):

        _k = os.path.splitext(key)

        if _k[1] not in ('.txt', '.jpg'):
            key = _k[0]

        return self.visible_files[key]
Compute joint feature vector of x and y.
dataset/ETHPy150Open rasguanabana/ytfs/ytfs/actions.py/YTActions.__getitem__--crossover with--dataset/ETHPy150Open pystruct/pystruct/pystruct/models/unstructured_svm.py/MultiClassClf.joint_feature