def single_high_initializer(low_genome='LOW', high_genome='HIGH'):
    """Generate a population that contains two types of genomes:
    all of the population will be 'LOW' except for one, which will
    be 'HIGH'."""
    first = True

    def create():
        nonlocal first
        if first:
            first = False
            return high_genome
        else:
            return low_genome
    
    return create