请问红框内代码为什么会报错?dbjebdjebdjjennskdnzhgavwuhwbkdkdknenx
2条回答 默认 最新
- 爱看书的小沐 2022-08-14 21:18关注
因为stu_no是类的成员变量,不是成员函数,后面不需要加括号“()”。
正确写法修改如下:stu.stu_no
测试的完整代码如下:
class Person(object): ''' a class Person ''' def __init__(self,name='',age=20,sex='man'): self.setName(name) self.setAge(age) self.setSex(sex) def setName(self,name): if not isinstance(name,str): raise Exception('name must be a string.') self._name=name def setAge(self,age): if type(age)!=int: raise Exception('age must be an integer.') self._age=age def setSex(self,sex): if sex not in ('man','woman'): raise Exception('sex must be "man" or "woman"') self._sex=sex def show(self): print(self._name, self._age, self._sex, sep='\n') class Student(Person): ''' a class Student ''' def __init__(self,name='test',age=30, sex='man', stu_no='20220001'): super().__init__(name,age,sex) self._stu_no = stu_no def setNo(self, stu_no): if not isinstance(stu_no, str): raise Exception('stu_no must be a string.') self._stu_no=stu_no def show(self): super().show() print(self._stu_no) if __name__=="__main__": stu=Student("Lily", 25, 'woman', '20220016') stu.setNo('20220055') print(stu._stu_no) stu._stu_no = '20220088' print(stu._stu_no) stu.show()
本回答被题主选为最佳回答 , 对您是否有帮助呢?解决 1无用