Question

我正在尝试实施医生的每周计划约会系统。我想知道如何使用货架来存储字典对象。如果有人可以查看我的代码并提出我可以进一步改进它的建议，那就太好了。如何将时隙字典存储在书架上？（我已经将星期一，星期二，星期三，星期四和星期五的对象附加到时隙字典中，现在不确定如何将这些对象在字典中存储到货架上。）

class default_timeslots:
    def __init__(self,day,time):
        self.__day = day
        self.__time = time

class Store:
    timeslots = {}
    def __init__(self):
        if len(__class__.timeslots) <= 0:
            self.create_default_timeslots()

    def create_default_timeslots(self):
        Monday = default_timeslots('Mon',time={"8:00","9:00","10:00","11:00","12:00","13:00","14:00","15:00","16:00","17:00","18:00"})
        Tuesday = default_timeslots('Tue',
                                   time={"8:00", "9:00", "10:00", "11:00", "12:00", "13:00", "14:00", "15:00", "16:00",
                                             "17:00", "18:00"})
        Wednesday = default_timeslots('Wed',
                                   time={"8:00", "9:00", "10:00", "11:00", "12:00", "13:00", "14:00", "15:00", "16:00",
                                             "17:00", "18:00"})
        Thursday = default_timeslots('Thursday',
                                   time={"8:00", "9:00", "10:00", "11:00", "12:00", "13:00", "14:00", "15:00", "16:00",
                                             "17:00", "18:00"})
        Friday = default_timeslots('Friday',
                                   time={"8:00", "9:00", "10:00", "11:00", "12:00", "13:00", "14:00", "15:00", "16:00",
                                             "17:00", "18:00"})

        Store.timeslots[Monday.day] = Monday
        Store.timeslots[Tuesday.day] = Tuesday
        Store.timeslots[Wednesday.day] = Wednesday
        Store.timeslots[Thursday.day] = Thursday
        Store.timeslots[Friday.day] = Friday

免责声明我是python和书架的初学者。

感谢您的帮助！

Answer 1

我修复了您的代码，因为它无法运行：

class default_timeslots:
    def __init__(self,day,time):
        self.day = day
        self.time = time

class Store:
    def __init__(self):
        self.timeslots = {}
        self.create_default_timeslots()

    def create_default_timeslots(self):
        Monday = default_timeslots('Mon',time={"8:00","9:00","10:00","11:00","12:00","13:00","14:00","15:00","16:00","17:00","18:00"})
        Tuesday = default_timeslots('Tue',
                                   time={"8:00", "9:00", "10:00", "11:00", "12:00", "13:00", "14:00", "15:00", "16:00",
                                             "17:00", "18:00"})
        Wednesday = default_timeslots('Wed',
                                   time={"8:00", "9:00", "10:00", "11:00", "12:00", "13:00", "14:00", "15:00", "16:00",
                                             "17:00", "18:00"})
        Thursday = default_timeslots('Thursday',
                                   time={"8:00", "9:00", "10:00", "11:00", "12:00", "13:00", "14:00", "15:00", "16:00",
                                             "17:00", "18:00"})
        Friday = default_timeslots('Friday',
                                   time={"8:00", "9:00", "10:00", "11:00", "12:00", "13:00", "14:00", "15:00", "16:00",
                                             "17:00", "18:00"})

        self.timeslots[Monday.day] = Monday
        self.timeslots[Tuesday.day] = Tuesday
        self.timeslots[Wednesday.day] = Wednesday
        self.timeslots[Thursday.day] = Thursday
        self.timeslots[Friday.day] = Friday

您试图在default_timeslots类内使用双下划线来使用私有属性，但这是一种不好的做法。 +您正在尝试在课堂外访问它们。我删除了下划线。

我不知道为什么要使用类属性和类似于类方法的方法。我让您阅读this以了解为什么类属性不会保存在您的书架中。这就是为什么我用实例属性替换了您的类属性。

类似地，当腌制类实例时，其类的代码和数据不随它们一起腌制。仅实例数据是腌制这是有目的的，因此您可以修复类中的错误或向类添加方法，并仍然加载使用创建的对象该课程的早期版本

要创建货架：

import shelve
store = Store()
output_shelve = shelve.open('test')
output_shelve['store'] = store
output_shelve.close()

要货架阅读：

input_shelve = shelve.open('test')
store = input_shelve['store']

当然，当您尝试从货架读取时（如果该内容不在同一脚本中），您需要导入Store类。

store.timeslots['Mon'].time

将返回：

{'10:00',
 '11:00',
 '12:00',
 '13:00',
 '14:00',
 '15:00',
 '16:00',
 '17:00',
 '18:00',
 '8:00',
 '9:00'}

Answer 2

您应该远离架子和其他基于文本的数据存储。而是使用SQLITE3并将字典转换为json格式并将其保存在数据库中。

为什么SQLITE3？它得到了更好的支持，它是一个实际的数据库，可以移交给其他系统。它可以更好地处理错误，并且不那么容易损坏。它也不会被弃用。

如果您想要实际的索引JSON存储，postgres是另一个适合这种情况的选项。

使用python书架存储字典对象

2 个答案: