class?Programer(object):
????hobby='Play?Computer'

????def?__init__(self,?name,?age,?weight):
????????self.name?=?name
????????self._age?=?age
????????self.__weight?=?weight
????
????@classmethod
????def?get_hobby(cls):
????????return?cls.hobby

????@property
????def?get_weight(self):
????????return?self.__weight

????def?self_introduction(self):
????????print?('My?name?is?%s?\nI?an?%s?years?old\n'?%(self.name,?self.age))

class?BackendProgramer(Programer):
????def?__int__(self,?name,?age,?weight,?language):
????????super(BackendProgramer,?self).__int__(name,?age,?weight)
????????self.language?=?language

if?__name__?==?'__main__':
????programer?=?BackendProgramer.('Albert',?25,?80,?'Python')
????print?(dir(programer))
????print?(programer.__dir__)
????print?(type(programer))
????print?(isinstance(programer,?Programer))

報錯信息如下：

Traceback (most recent call last):

? File "C:/Users/WMY/Documents/python study/2017-2-12.py", line 26, in <module>

? ? programer = BackendProgramer('Albert', 25, 80, 'Python')

TypeError: __init__() takes 4 positional arguments but 5 were given

不懂啥意思，只有4個參數(shù)呀，求解？