1、獲取類的屬性

class Teacher:
    dict = {'檢視學生資訊':'','檢視講師資訊':''}
    def show_student(self):
        print('show_student')

    def show_teacher(self):
        print('show_teacher')

    @classmethod
    def func(cls):
        print('hahha')

ret2 = getattr(Teacher,'func')     #呼叫類方法時，只需執行此方法即可
ret2()

ret = getattr(Teacher,'dict')       #呼叫類屬性，必須要列印
print(ret)
>>>hahha
>>>{'檢視學生資訊': '', '檢視講師資訊': ''}
 

2、hasattr總是與getattr連在一起使用：

    class Teacher:
        dict = {'檢視學生資訊':'','檢視講師資訊':''}
        def show_student(self):
            print('show_student')
        def show_teacher(self):
            print('show_teacher')
    
        @classmethod
        def func(cls):
            print('hahha')
    
    if hasattr(Teacher,'func'):
        ret2 = getattr(Teacher,'func')
    ret2()
    
    ret = getattr(Teacher,'dict')
    print(ret)
>>>hahha
>>>{'檢視學生資訊': '', '檢視講師資訊': ''}
 

3、用物件呼叫屬性和方法：

class Teacher:
    dict = {'檢視學生資訊':'','檢視講師資訊':''}
    def show_student(self):
        print('show_student')

    def show_teacher(self):
        print('show_teacher')

    @classmethod
    def func(cls):
        print('hahha')

alex = Teacher()
func = getattr(alex,'show_student')
func()
>>>show_student