def get_times(self):
        """Return all the action times and times-1e-6 in a list"""
        if not self.n:
            return []
        self.times = list(mul(self.u1, self.t1)) + \
            list(mul(self.u2, self.t2)) + \
            list(mul(self.u3, self.t3)) + \
            list(mul(self.u4, self.t4))

        self.times = matrix(list(set(self.times)))
        self.times = list(self.times) + list(self.times - 1e-6)
        return self.times
Return all the action times and times-1e-6 in a list