Same in data_loader.py

      """

      # TODO don't convert all sequences into np array (allow shards)

      def _generate_sequences(fasta_file, header_mark=">") -> np.array:

      def _generate_sequences(fasta_file, header_mark=">") -> np.ndarray:

        """

        Uses a fasta_file to create a numpy array of annotated FASTA-format strings

        """

        sequences = _add_sequence(sequences, sequence)  # Add last sequence

        return sequences

      def _add_sequence(sequences: np.array, sequence: np.array) -> np.array:

      def _add_sequence(sequences: np.ndarray, sequence: np.ndarray) -> np.ndarray:

        # Handle empty sequence

        if sequence is None or len(sequence) <= 0:

          # TODO log attempts to add empty sequences every shard