def widthwrap(dna: str, wrap_length: int = 10):
    """Returns a dna wrapped after each ``wrap_length``
    number of base-pairs.
    """
    return "\n".join(
        [
            dna[i * wrap_length : (i + 1) * wrap_length]
            for i in range((len(dna) - 1) // wrap_length + 1)
        ]
    )