动态变量创建

本文介绍了动态变量创建的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我的问题是如何即时"创建变量.我正在尝试生成具有一组随机属性的对象.

My question is how to create variables "on the fly". I'm trying to generate an object with a random set of attributes.

from random import randint, choice class Person(object): def __init__(self): self.attributes = [] possible_attributes= ['small', 'black', 'scary', 'smelly', 'happy'] # idk, random chance = randint(1,5) chosen_attributes = [] for i in xrange(chance): #psuedo code... local_var = choice(possible_attributes) if local_var not in chosen_attributes: VAR = local_var # VAR needs to be dynamic and 'global' for use later on chosen_attributes.append(local_var) Person.attributes.append(local_var)

我很肯定我想做的事不是一个好方法，因此，如果有人了解我在寻找什么并且可以提供一种更好的方法(一种对初学者有效的方法)，我将非常感激

I'm positive how I'm wanting to do this is not a good way, so if anyone understand what I'm looking for and can offer a better method (one that works, for starters) I would be most appreciative.

推荐答案

要将属性添加到类的实例，可以使用 .__ dict __ :

To add attributes to an instance of the class you can use .__dict__:

class Person(object): def addattr(self,x,val): self.__dict__[x]=val

输出:

>>> a=Person() >>> a.addattr('foo',10) >>> a.addattr('bar',20) >>> a.foo 10 >>> a.bar 20 >>> b=Person() >>> b.addattr('spam','somevalue') >>> b.spam 'somevalue'