Python實現(xiàn)JavaBeans流程詳解

更新時間：2023年01月14日 16:45:06 作者：牛油菠蘿包

這篇文章主要介紹了Python實現(xiàn)JavaBeans流程，文中通過示例代碼介紹的非常詳細，對大家的學習或者工作具有一定的參考學習價值，需要的朋友們下面隨著小編來一起學習吧

場景

在Python中，以前可能會這樣寫嵌套字典結(jié)構(gòu)

school_list = [{
    'school_name': 'SZ',
    'class_id': '001',
    'stu_num': 45,
    'student':{
        'stu_id': '001',
        'stu_name': 'xiaohong',
        'stu_score': 90
    }
},
{
    'school_name': 'Fxxking U',
    'class_id': '002',
    'stu_num': 40,
    'student':{
        'stu_id': '002',
        'stu_name': 'xiaobai',
        'stu_score': 98
    }
}]

而當我們要訪問比較深層結(jié)構(gòu)中的數(shù)據(jù)時可能要這樣：

print(school_list[0]['student']['stu_id'])

這樣在取用時未免太麻煩，而且一旦嵌套結(jié)構(gòu)越深層，取用時就越麻煩。

JavaBeans in Python

如果借鑒JavaBeans的思維，將此用類實現(xiàn)，會是以下這樣：

# School.py
class School(object):
    def __init__(self,school_name='',class_id='',stu_num=0,student=None) -> None:
        self._school_name = school_name
        self._class_id = class_id
        self._stu_num = stu_num
        self._student = student
    @property
    def school_name(self):
        return self._school_name
    @school_name.setter
    def school_name(self,new_name):
        self._school_name = new_name
    @property
    def class_id(self):
        return self._class_id
    @class_id.setter
    def class_id(self,new_id):
        self._class_id = new_id
    @property
    def stu_num(self):
        return self._stu_num
    @stu_num.setter
    def stu_num(self,new_num):
        self._stu_num = new_num
    @property
    def student(self):
        return self._student
    @student.setter
    def student(self,new_student):
        self._student = new_student

# Student.py
class Student(object):
    def __init__(self,stu_id='',stu_name='',stu_score=0) -> None:
        self._stu_id = stu_id
        self._stu_name = stu_name
        self._stu_score = stu_score
    @property
    def stu_id(self):
        return self._stu_id
    @stu_id.setter
    def stu_id(self,new_id):
        self._stu_id = new_id
    @property
    def stu_name(self):
        return self._stu_name
    @stu_name.setter
    def stu_name(self,new_name):
        self._stu_name = new_name
    @property
    def stu_score(self):
        return self._stu_score
    @stu_score.setter
    def stu_score(self,new_score):
        self._stu_score = new_score

我們將原有的嵌套字典數(shù)據(jù)轉(zhuǎn)換為兩個類實現(xiàn)，且分別在School.py與Student.py兩個文件中，在類中我們對原本的數(shù)據(jù)以裝飾器粉飾為屬性從而使其可以進行讀取與修改。這樣一來，我們就可以用類屬性的方式去訪問我們想要的數(shù)據(jù)。

程序代碼：

from School import School
from Student import Student
student_007 = Student(stu_id='007',stu_name='零零漆',stu_score=99)
school_Princeton = School(school_name='Princeton U',class_id='005',stu_num=1000,student=student_007)
student_qnc = Student(stu_id='250',stu_name='千年蟲',stu_score=60)
school_Fuxxking = School(school_name='Fuxxking U',class_id='009',stu_num=500,student=student_qnc)
school_list = [school_Princeton,school_Fuxxking]
for i in school_list:
    print(i.school_name)
    print(i.class_id)
    print(i.stu_num)
    stu = i.student
    print(stu.stu_name)

輸出結(jié)果：