class Calculator:
def calculator(self, expression):
self.value = eval(expression)
return self.value
def printResult(self):
print('result: {}'.format(self.value))
class MyPrint:
def print(self, msg):
print('msg: ', msg)
def printResult(self):
print('结果: {}'.format(self.value))
class MyCalculator1(Calculator, MyPrint):
pass
class MyCalculator2(MyPrint, Calculator):
pass
my1 = MyCalculator1()
print(my1.calculator('8 + 2 * 6'))
my1.print('hello')
my2 = MyCalculator2()
print(my2.calculator('1 + 1 * 1'))
my1.print('world')
20
msg: hello
2
msg: world
如果Python类的多个父类存在相同的成员,按着什么规则处理
如果多个分类存在冲突的成员,会使用最先遇到的成员
my1.printResult()
my2.printResult()
result: 20
结果: 2
70 - 描述异常捕捉语句中else 的作用