def __init__(self, value, g, delta):
        """
        Tuple t = (v, g, delta)

        Parameters
        ----------
        value : float
            value that corresponds to one of the elements of the sequence.

        g : float
            g = r_min(value_[i]) - r_min(value_[i-1])

        delta : float
            r_max - r_min
        """
        self.value = value
        self.g = g
        self.delta = delta

        Tuple t = (v, g, delta)

        Parameters
        ----------
        value : float
            value that corresponds to one of the elements of the sequence.

        g : float
            g = r_min(value_[i]) - r_min(value_[i-1])

        delta : float
            r_max - r_min
        
optbinning/binning/distributed/gk.py