code: def get_times(self):
          
          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
docs: Return all the action times and times-1e-6 in a list