Initializes the stats dict for individual
    The statistics initialized are:
        'generation': generation in which the individual was evaluated. Initialized as: 0
        'mutation_count': number of mutation operations applied to the individual and its predecessor cumulatively. Initialized as: 0
        'crossover_count': number of crossover operations applied to the individual and its predecessor cumulatively. Initialized as: 0
        'predecessor': string representation of the individual. Initialized as: ('ROOT',)

    Parameters
    ----------
    individual: deap individual

    Returns
    -------
    object

def initialize_stats_dict(individual):
    '''
    Initializes the stats dict for individual
    The statistics initialized are:
        'generation': generation in which the individual was evaluated. Initialized as: 0
        'mutation_count': number of mutation operations applied to the individual and its predecessor cumulatively. Initialized as: 0
        'crossover_count': number of crossover operations applied to the individual and its predecessor cumulatively. Initialized as: 0
        'predecessor': string representation of the individual. Initialized as: ('ROOT',)

    Parameters
    ----------
    individual: deap individual

    Returns
    -------
    object
    '''
    individual.statistics['generation'] = 0
    individual.statistics['mutation_count'] = 0
    individual.statistics['crossover_count'] = 0
    individual.statistics['predecessor'] = 'ROOT',