我不明白为什么最后一个断言不起作用。错误消息“type object'Student'has no attribute'name'”使我更加困惑,因为Student有一个名为name的属性。有什么解决办法吗
class Student:
def __init__(self, name, imt_name, semester):
self.name = name
self.imt_name = imt_name
self.semester = semester
def get_name(self):
return self.name
def __str__(self):
return ("{} [{}] in Semester {}".format(self.name, self.imt_name, self.semester))
x = property(get_name)
#asserts and test
assert type(Student) is type
student_horst = Student("Horst", "horst99", 2)
assert student_horst.name == "Horst"
assert student_horst.imt_name == "horst99"
assert student_horst.semester == 2
student_horst.semester = 3
assert student_horst.semester == 3
#this one is not working!
assert isinstance(getattr(Student, "name"), property)
要检查实例是否具有给定的属性(按名称),需要使用^{} 函数,如下所示:
名字从来不是一个属性,x是
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