statistics_noise.py 文件源码

def get_sanity_check_counter():
    '''
    Provide a dictionary with the standard sanity check counter values.
    It is typically used like:
        counters['ZeroCount'] = get_sanity_check_counter()
    All of these values are unused, except for:
        bins:
            - [-inf, inf] (a long counter is appended by SecureCounters,
                           it should only ever have blinding values added)
        estimated_value: 0.0 (TODO: used for checking if stats have changed)
        sigma: 0.0 (used for adding noise, 0.0 means no noise is added)
    '''
    sanity_check = {}
    sanity_check['bins'] = []
    single_bin = [float('-inf'), float('inf')]
    sanity_check['bins'].append(single_bin)
    sanity_check['sensitivity'] = 0.0
    sanity_check['estimated_value'] = 0.0
    sanity_check['sigma'] = 0.0
    sanity_check['epsilon'] = 0.0
    sanity_check['expected_noise_ratio'] = 0.0
    return sanity_check