human
2.6 多个父类
一个类的父类可能多于一个，如下：

Can you provide a the Python program you requested?
assistant
#Here is the Python program you requested.
class Calculator:
    def calculate(self,expression):
        self.value=eval(expression)
class Talker:
    def talk(self):
        print 'Hi,my value is ',self.value
class TalkingCalculator(Calculator,Talker):
    pass