Python class类@staticmethod及@classmethod区别浅析

class Person():
    FEATURE = 'P'    
    def __init__(self):
        pass
class Teacher(Person):
    FEATURE = 'T'
    def __init__(self):
        pass
class Student(Person):
    FEATURE = 'S'    
    def __init__(self):
        pass

class Student(Person):
    FEATURE = 'S'    
    def __init__(self):
        pass
    @staticmethod
    def is_student(obj):
        if obj.FEATURE == 'S':            
            return True
        else:
            return False

class MathTeacher(Teacher):
    TEACHING = 'MATH'
    def __init__(self):
        pass
class DrawingTeacher(Teacher):
    TEACHING = 'DRAWING'
    def __init__(self):
        pass

class Teacher(Person):
    FEATURE = 'T'
    def __init__(self):
        pass
    @classmethod
    def category(cls):
        science_cate = ['MATH']
        arts_cate = ['DRAWING', 'PAINTING']
        teaching = getattr(cls, 'TEACHING', None)
        if teaching in science_cate:
            return 'Science'
        elif teaching in arts_cate:
            return 'Arts'
        else:
            return 'Unknow'

p = Person()
t = Teacher()
s = Student()
print(Student.is_student(p))    ＃False
print(Student.is_student(t))    ＃False
print(Student.is_student(s))    ＃True

print(DrawingTeacher.category())    ＃Arts
print(MathTeacher.category())       ＃Science
print(Teacher.category())           ＃Unknow

teacher_wang = DrawingTeacher()
teacher_li = MathTeacher()
teacher = Teacher()
print(teacher_wang.category())    ＃Arts
print(teacher_li.category())      ＃Science
print(teacher.category())         ＃Unknow