class?animal(object):????
????pass?????
dog=animal()
cat=animal()
dog.name="xiaohuang"
dog.age='1'
cat.name='xiaohua'
cat.age='1.5'
print?(dog.name)
print?(dog.age)
print?(cat.name)
print?(cat.age)

class?animal(object):????pass?????dog=animal()cat=animal()dog.name="xiaohuang"dog.age='1'cat.name='xiaohua'cat.age='1.5'print?(dog.name)print?(dog.age)print?(cat.name)print?(cat.age)

print后面有空格

?print(dog.name)
?print(dog.age)
?print(cat.name)