def get_correlation(self, t1, t2):
        """
        Computes the correlation coefficient for the specified periods.

        :param float t1:
            First period of interest.

        :param float t2:
            Second period of interest.

        :return float:
            The predicted correlation coefficient.
        """

        if t1 not in act.periods:
            raise ValueError('t1 not a valid period')

        if t2 not in act.periods:
            raise ValueError('t2 not a valid period')

        return act.coeff_table[act.periods.index(t1)][act.periods.index(t2)]
def get_correlation ( self , t1 , t2 ) : if t1 not in act . periods : raise ValueError ( 't1 not a valid period' ) if t2 not in act . periods : raise ValueError ( 't2 not a valid period' ) return act . coeff_table [ act . periods . index ( t1 ) ] [ act . periods . index ( t2 ) ]
Computes the correlation coefficient for the specified periods.

        :param float t1:
            First period of interest.

        :param float t2:
            Second period of interest.

        :return float:
            The predicted correlation coefficient.