class?Animal():
????def?__init__(self,name,age):
????????self.name?=?name
????????self.age?=?age
????????print('{}今年{}歲'.format(name,age))

dog?=?Animal('汪汪',18)
cat?=?Animal('喵喵',30)

class?Animal(object):
????def?__init__(self,?name,?age):
????????self.name?=?name
????????self.age?=?age


dog?=?Animal('Tim',?4)
cat?=?Animal('Aim',?5)
print(dog.name)
print(dog.age)
print(cat.name)
print(cat.age)

def后有個(gè)空格，init前后是兩個(gè)下劃線(xiàn)