使用Python在运行时创建对象 [英] Creating objects during runtime in Python

问题描述

在运行时创建对象时，我很难理解OOP概念.我研究过的所有教育法规都定义了特定的变量，例如'Bob'并将它们分配给一个新的对象实例.鲍勃= Person()

I have a problem grasping the OOP concept when it comes to creating objects during runtime. All the educational code that I have looked into yet defines specific variables e.g. 'Bob' and assigns them to a new object instance. Bob = Person()

我现在很难理解的是如何设计一个在运行时创建新对象的模型?我知道我的措辞可能是错误的，因为所有对象都是在运行时生成的，但是我的意思是，如果要在终端或UI中启动应用程序，我将如何创建和管理新对象.我真的不能即时定义新的变量名吗?

What I have trouble understanding now is how I would design a model that creates a new object during runtime? I'm aware that my phrasing is probably faulty since all objects are generated during runtime but what I mean is that if I were to start my application in a terminal or UI how would I create new objects and manage them. I can't really define new variable names on the fly right?

我遇到这个设计问题的示例应用程序是一个存储人员的数据库.用户将获得一个终端菜单，该菜单允许他创建一个新用户并分配姓名，薪水和职位.如果要管理对象，调用函数等，该如何实例化该对象并在以后调用它?这里的设计模式是什么?

An example application where I run into this design issue would be a database storing people. The user gets a terminal menu which allows him to create a new user and assign a name, salary, position. How would you instantiate that object and later call it if you want to manage it, call functions, etc.? What's the design pattern here?

请原谅我对OPP模型的理解不足.我目前正在阅读有关类和OOP的内容，但是我觉得在继续之前需要了解我的错误所在.请让我知道是否需要澄清.

Please excuse my poor understanding of the OPP model. I'm currently reading up on classes and OOP but I feel like I need to understand what my error is here before moving on. Please let me know if there is anything I should clarify.

推荐答案

列表或字典之类的东西对于存储动态生成的值/对象集非常有用:

Things like lists or dictionaries are great for storing dynamically generated sets of values/objects:

class Person(object):
    def __init__(self, name):
        self.name = name
    def __repr__(self):
        print "A person named %s" % self.name

people = {}
while True:
    print "Enter a name:",
    a_name = raw_input()

    if a_name == 'done':
        break

    people[a_name] = Person(a_name)

    print "I made a new Person object. The person's name is %s." % a_name

print repr(people)

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