试试这个：

Try this:

class Information:
    def __init__ (self,first,last,pay):
        self.first = first
        self.last = last
        self.pay = pay

    def __str__(self):
        return self.first + " " + self.last + " will get " + str(self.pay)

    def extra(self, value):
        print("adding bonus of ", value)
        self.pay += value

emp1 = Information("tom","jerry",555666)
print(emp1)
emp1.extra(111)
print(emp1)