def get_nbr_species(nbr_species):
    """Get the Nbr_Species section of the input file"""

    if not isinstance(nbr_species, int):
        raise TypeError("nbr_species must be an int")

    inp_data = """
# Nbr_Species
{nbr_species}
!------------------------------------------------------------------------------
""".format(
        nbr_species=nbr_species
    )

    return inp_data