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class Dog():
def _init_(self, name, age):
self.name=name
self.age=age
def sit(self):
print(self.name.title()+'is now sitting.')
def roll_over(self):
print(self.name.title()+'rolled over.')
my_dog=Dog('willie',6)
print('My dog\'s name is '+my_dog.name.title()+',')
print('My dog is '+str(my_dog.age)+'years old.')
为何运行结果是:
my_dog=Dog('willie', 6)
TypeError: object() takes no parameters
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