Cat' object has no attribute 'show_info 为什么报错呢

class Cat(object):
    def __init__(self,name,age,color):
        self.name = name
        self.age = age
        self.color = color
        return
def show_info(self):
    print('我叫{},今年{}岁,我是{}的'.format(self.name,self.age,self.color))
def eat(self):
    print('我爱吃鱼')
def catch(self):
    print('我能捉老鼠')
if __name__ =='__main__':
        cat1 = Cat('花花',2,'黑色')
        cat1.show_info()
        cat1.eat()
        cat2 = Cat('雪球',3.5,'白色')
        cat2.show_info()
        cat2.catch()