def num_samples(self):
        """
        Return the total number of samples.
        """
        with self.container.open_if_needed(mode='r') as cnt:
            return cnt.get(self.key)[0].shape[0]
def num_samples ( self ) : with self . container . open_if_needed ( mode = 'r' ) as cnt : return cnt . get ( self . key ) [ 0 ] . shape [ 0 ]
Return the total number of samples.